Posted on

silver to make femized seed on branch of cannabis plant

How to make Colloidal Silver to make Feminized seeds

So I have doing some research on making feminized seeds and I came across this bit of info. I will not be able to try this for a couple months since I don’t grow indoors. Has anyone or someone they know ever attempted to make fem seeds using this method.
This is some info i found. Someone else wrote this stuff.
Thought it might be some useful info for anyone interested in trying to make those fem seeds.

Im using silver coins, but you can essentially use any form of silver including silver wire as long as its 999 or 9999 pure (i bought mine from my local Mint, but you easily get silver off ebay too.

Also, you dont need to solder alligator clips on, the important thing is simply that the wires are touching the silver so the electric current can flow through them, but i think the alligator clips add a nice touch plus they make it easier to hold the silver, so if you’ve got some spare alligator clips and have a soldering iron then I recommend it!

have reported excellent success with this method, and it’s no secret that colloidal silver has been used for a long time now to ‘reverse’ the sex of cannabis plants, although thanks to their help hopefully the process of making our own CS will no longer be shrouded in mystery!

What is Colloidal Silver?
Colloidal Silver is pure, metallic silver (the element), in particles of 15 atoms or fewer, each with a positive electric charge and attached to a molecule of a simple protein. These electrically charged particles of silver are extremely small, usually ranging from about 0.001 to about 0.01 microns in diameter, and are suspended in deionized water. The force of the electric charge is stronger than the force of gravity, so the silver particles remain suspended.

In a nutshell how is Colloidal Silver made?
You simply pass a small electric current through distilled water using a pure silver electrode (im using coins). That is essentially all there is to it. Contrary to popular belief, distilled water will conduct a small amount of electricity, allowing production of micro particulate colloidal silver.

What the hell does it have to do with cannabis.
We use Colloidal Silver (CS) for making FEMINISED SEEDS, which I’m a big fan of after having nothing but great success from them since i started growing a few years ago

(The basic idea being you regularly spray CS on a female to force it to create bananas ie. pollen . you then use that pollen to fertilize another female (or even itself, ie "selfing"), and the resulting seeds are feminised due to the pollen coming from a female instead of a male)

Also, there are some other substances that can be used to force male parts on female plants, including STS (silver theosulphate, which is silver nitrate + sodium theosulphate) and GA (giberillic acid), but CS is non-toxic, easy, safe and inexpensive to make at home, doesn’t require a DEA request form, and isn’t a controlled substance.

Csilver is available from your local chemist (in low parts-per-million though), and is drank for good health (the silver helps kill bacteria etc). But its PPM is too low for what we intend to use it for – feminised seeds! So we need to make our own with a higher PPM . no problems, we simply allow the electrical current to flow through the silver for a longer duration

TO MAKE A COLLOIDAL SILVER GENERATOR .
You will need: a 9V power adapter that outputs DC, two alligator clips, a soldering iron + solder. (If you dont have soldering iron you can simply wrap the wire around the alligator clip base in a coil and that will suffice, but youll get better contact if you solder it).
– Get a power adapter that has an output of 9V DC 600mA or thereabouts. Output must be DC, and 9V/600mA seems optimal from what I’ve read and been told
– Cut the end off and discard
– Split the main wire into its two smaller sub-wires (no need to pull them apart all the way though). Dont worry, we dont need to know which is positive/negative.
– Use wire-cutters to remove the plastic shielding/insulation to expose the actual metal wires, about 1 inch is enough
– Solder the wires onto alligator clips ($0.50ea from your local electronics store)

If you dont have alligator clips Haps suggested a good alternative – drill a hole into each coin and coil the wire around that instead.

TO MAKE COLLOIDAL SILVER .
– Get some distilled water. Do not use any other type of water due to impurities. At your supermarket you may find distilled water next to spring water, but it may also be in the ironing products isle as it is commonly used for steam irons.
– Attach each alligator clip to a chunk of PURE 999 or 9999 SILVER (i just got two 1oz coins from the local Mint, approx US$20ea, but 1/2oz coins wouldve been suffice – i didnt realise how big 1oz of silver was!)
– Make sure each coin is half-dunked in the water, but that the alligator clips themselves arent touching the water, then turn on your generator and leave it for about 7 hours. (goldking leaves his on "overnight" and thus probably gets an even higher PPM, but has had good results from it!)
The end result: the electrolysis causes microscopic silver particles to be suspended in the water (= colloidal silver aka CS). The rig basically looks like this when in use (the only thing in contact with the water is the silver, not the alligator clips or anything else):

It’s also recommended you use an airpump with a clean (not used for anything else) airstone to help keep the water moving.

Also you don’t want to leave the CS generator running TOO long or the silver particles in the water start getting too large –

8 hours should be plenty.

USING COLLOIDAL SILVER TO MAKE FEMINISED SEEDS .
Start spraying your target plant with CS just before you send it into 12/12 flowering, and keep spraying every few days. I won’t go into details, but the CS causes the female to produce male flowers/pollen. Collect that pollen, and use it to pollenate another female (you can pollenate the same female that you CS’d (aka "self’ing") and indeed you may have to if you have a clone-only strain, although that may lead to more hermaphroditic traits, but I wont go into details on that). Anyway, because you’ve pollenated a plant with pollen from a female, the pollen can only create female seeds.

There’s obviously a lot more to it than that but hopefully this brief explanation will help people understand the basic jist of it

ps. I don’t recommend drinking home-made CS unless you’ve done your homework because the PPM may be too high, which is great for making feminised seeds (we need a higher PPM for that) but may have risks with human consumption – too much silver can cause argyria, a condition of blue or gray discoloration of the skin, so always buy it from your chemist if you intend to use it medicinally. Also if you do drink it medicinally it’s recommended you also take additional probiotics (like Yakult), because the silver also kills a lot of the good bacteria inside you. So do your homework first!

don’t know what the RULES are for misting the plants,but i soak the heck out of mine when i spray,every day, not just a lil damp mist,thats why if i had to pay $20+ for a lil bottle at the health store, i could never afford to use CS.

i touch my ingots together to look for a miniscule spark arch to see if every thing has positive contact and is working. the spark, if there will be very very faint, kinda like rubbing a cat on the wall, the sparks are hard to see

How to make Feminized seeds(stolen from another site)

There are two main methods to create your own feminized cannabis seeds:

  • the colloidal silver spray method or
  • using rodelization.
  • You’re able to produce feminized seeds using any two female cannabis planst (even clone-only strains!)
  • You can produce seeds consistently
  • You can control how many seeds produced
  • Easy to make hundreds of feminized seeds if needed
  • You will need to find a source of colloidal silver which well be used to soray the cannabis plants as they start flowering. Your main options are: buying colloidal silver directly, buying a colloidal silver generator, or making your own simple colloidall silver generator yourself (instructions below)
  • It is not safe to directly use/consume any cannabis which has come into contact with colloidal silver, though any seeds produced by a treated plant’s pollen are 100% safe. Note:Some space-starved pot farmers will use the colloidal silver to spray just the bottom branch of a cannabis plant so they can still smoke/use the rest of the cannabis buds. You can definitely do this, just be extremely careful not to get any colloidal silver spray on any part of the cannabis that you will be consuming.

This solution of silver in water is called colloidal silver and can be purchased from a pharmacy/online or easily made at home . Or you can make it with a colloidal silver generator.
Some people drink colloidal silver for its health benefits and others use it occasionally on plants to help control bacteria, insect, and fungus growth on the leaves.
To take advantag of this, you thoroughly mist a female cannabis plant with colloidal silver every day right when she enters the flowering stage, she will start growing male "balls" full of pollen. Keep misting the plants daily until you see the beginning of male pollen sacs forming, usually around 10-14 days.
The concentration of silver ions in the water actually act as an ethylene inhibitor/antagonist on the plant, which forces the plant to create male pollen sacs instead of female buds.
After the balls start forming
You need to let the sacs swell like a big empty balloon.
You will be able to tell when they are about to open because the leaf section protecting the pollen starts to crack.
At this point, simply take the pollen sacs off and place them in a cool dry place for a week and let them start to dry.
The pollen will come out if you shake them about a little, or you can also cut open the sacs to get to the pollen inside.
Use this pollen to pollinate female plants and you will get all-female seeds that are a mix of both their mothers.
This method is great because it will force almost any female cannabis plant to show male characteristics.
Unlike the rodelization method described below, you are not selecting for plants that show hermaphrodite traits. The genes of the plant are completely unaffected. This method will also produce a lot of pollen consistently compared to the rodelization method.
The one downside to this method is that it is not safe to use any cannabis that has come into direct contact with colloidal silver.
You should therefore destroy the plant after the pollen has been collected.
You will also want to ensure that you clean off any remaining traces of silver off your equipment in case you accidentally contaminate another cannabis plant with silver.
Here are the main things to keep in mind when using colloidal silver spray method:

  1. Make sure you spray the cannabis with a strong enough colloidal silver solution (at least 30 PPM of silver)
  2. Spray the cannabis thoroughly to almost drench all the parts you want to turn into pollen sacs
  3. Spray the cannabis regularly, at least once a day for 10-14 days, starting when you change the lights to 12-12
  4. Spray the cannabis with colloidal silver every day until you see signs of male pollen sacs forming. Some hardy strains may need over 2-3 weeks spraying before they ‘turn’.
  • 9 volt battery
  • 9v Battery Connector (less than $2 at a hardware or electronics store)
  • Pure .9999 or 999 Silver (yes it must be pure)
  • Distilled water (yes it must be distilled)
  • Alligator clips (Optional: but will make things much easier) (Optional: only needed if you want to use alligator clips)

The diagram above will show you how to easily make your own colloidal silver to make your own feminized cannabis seeds
When you first connect everything, you may be surprised because it will seem like nothing is happening. You will know if it worked by the next day because the whole process will leave a silvery residue on your silver. You may need to use sandpaper or something else rough to clean your silver each time after creating a batch of colloidal silver.
If you don’t have a soldering iron and would still like to solder alligator clips onto your battery connector, then I recommend going to a hardware store and asking someone if they will help solder it for you.
Remember to keep your resulting colloidal silver solution away from any light or it will deteriorate and turn a dark gray color. If this happens, then you can no longer use the solution for creating feminized seeds.
Avoid most problems when making colloidal silver by:

  • using pure (distilled) water
  • using pure (999/.9999) silver
  • giving electrolysis enough time to work so you don’t get a weak solution (at least overnight)
  • making sure the solution has as little contact with light as possible until you use it
  • All-Natural
  • Very Simple
  • Unreliable
  • May not produce many feminized seeds
Ringsixty
Well-Known Member
MrEDuck
Well-Known Member

This is a writeup on a method using silver thiosulfate which has a similar mechanism of action to CS but some plants respond better to one method.
The following is a safe, inexpensive, and successful method for reversing the sex of female cannabis plants. Individual plant responses may vary based upon strain, but I can verify that this process is fully effective in stimulating profuse staminate flower production.

This process can be used to:
A: create new feminized seeds from solitary prize mothers that you currently have
B: create interesting feminized-seed hybrids from different prize strains that you currently have
C: create feminized seeds for optimum outdoor use
D: accelerate the "interview" phase of cultivation, in searching for interesting new clone-mothers
E: reduce total plant numbers- great for medical users with severe plant number restrictions
F: increase variety, by helping to create stable feminized seedlines to be used as an alternative to clones

At the bottom of this post are some specific details about the chemicals used, their safety, their cost, and where to get them.

It is important to educate yourself about cannabis breeding theory and technique prior to using a method like this one. Here is a link to Robert Clarke’s "Marijuana Botany", which is a very good reference.

It is also important to use basic safety precautions when mixing and handling these chemicals, so read the safety data links provided. The risk is similar to mixing and handling chemical fertilizers, and similar handling procedures are sufficient.

Remember: nothing will ever replace good genetics, and some of your bounty should always go back towards the professional cannabis breeders out there. the ones who have worked for many generations to come up with their true-breeding F1 masterpieces. Support professional breeders by buying their seeds. Also, order from Heaven’s Stairway. Not that they need a plug from me, but they are very professional and provide very fast service worldwide.

Preparation of STS:
First, a stock solution is made. It consists of two parts (A and B) that are initially mixed separately, then blended together. Part A is ALWAYS mixed into part B while stirring rapidly. Use distilled water; tap water may cause precipitates to form.

Wear gloves while mixing and using these chemicals, and mix and use in a properly ventilated area. A mask will prevent the breathing of any dust, which is caustic. STS is colorless and odorless, and poses minimal health risks if used as described here. (See material safety data sheet links below). Note that silver nitrate and STS can cause brown stains upon drying, so spray over newspaper and avoid spilling.

Part A: 0.5 gram silver nitrate stirred into 500ml distilled water
Part B: 2.5 grams sodium thiosulfate (anhydrous) stirred into 500ml distilled water

The silver nitrate dissolves within 15 seconds. The sodium thiosulfate takes 30-45 seconds to dissolve.

The silver nitrate solution (A) is then mixed into the sodium thiosulfate solution (B) while stirring rapidly. The resulting blend is stock silver thiosulfate solution (STS).

This stock solution is then diluted at a ratio of 1:9 to make a working solution. For example, 100ml of stock STS is added to 900ml of distilled water. This is then sprayed on select female plants.

Both the stock STS and the working solution should be refrigerated after use, as well as the powdered chemicals, to avoid activity loss. Excess working solution can be safely poured down the drain after use (with ample running water) with negligible environmental impact. It’s pretty cheap.

Each liter of stock STS will make ten 1-liter batches of working solution of STS. With the minimum amount of base chemicals ordered from Photographer’s Formulary (see link below), this means that each 1-liter bottle of working solution STS costs less than 9 cents, and can treat 15-20 mid-sized plants. That’s 200 1-liter batches of STS for $18. Note that the distilled water costs far more than the chemicals.

Application:
The STS working solution is sprayed on select female plants until runoff. Do the spraying over newspaper in a separate area from the flower room. You probably won’t smell anything, but ventilate anyway. You now have what I call a "F>M plant"; a female plant that will produce male flowers.

After the F>M plant dries move it into 12/12 immediately. This is usually done three to four weeks prior to the date that the target (to be pollinated) plants will be ready to pollinate. Response times may vary slightly depending upon the strain. More specific times can be determined by trial with your own individual strains. In my trials it took 26 days for the first pollen. 30-35 days seems optimum for planning purposes.

So, assuming that a target plant needs 3-4 weeks to produce fully mature seeds, a strain that takes 8 weeks to mature should be moved into flower at about the same time as the female>male plant. A target plant that finishes flowering in 6 weeks needs to be moved into flower later (10 days or so) so that it doesn’t finish before the seeds can fully mature.

A seeded individual branch can be left to mature on a plant for a bit longer, while harvesting the other seedless buds if they finish first. Just leave enough leaves on for the plant for it to stay healthy.

Effects:
Within days I noticed a yellowing of the leaves on the F>M plants. This effect persisted for two weeks or so; after this they became green again, except for a few of the larger fans. The plants otherwise seemed healthy. No burning was observed. Growth stopped dead for the first ten days, and then resumed slowly. No stretch was ever seen. After two weeks the F>M plants were obviously forming male flower clusters. Not just a few clusters of balls, but complete male flower tops. One plant still formed some pistillate flowers, but overall it was predominantly male.

It is strange indeed to see an old girlfriend that you know like the back of your hand go through a sex change. I’ll admit that things were awkward between us at first.

When the F>M plants look like they may soon open and release pollen, ( 3-1/2 to 4 weeks) move them from the main flower room into another unventilated room or closet with lighting on a 12/12 timer. Don’t worry too much about watts per square foot; it will only be temporary.

When the pollen flies, move your target plants into the closet and pollinate.

A more controlled approach is to isolate the F>M plants in a third remote closet (no light is necessary in this one, as they are releasing pollen now and are nearly finished anyway). In this remote other closet the pollen is very carefully collected in a plastic produce bag or newspaper sleeve and then brought back to the lighted closet, where the target plants are now located. If this is done, be careful to not mix pollen types by letting the F>Ms dust each other. Avoid movement, or use yet another closet.

Take special care to not let pollen gather on the outside of this bag- a static charge is sometimes present. Drop small open clusters of blooms inside and then close the bag at the mouth and shake. Important: next, step outside and slowly release the excess air from the bag, collapsing it completely, so that pollen doesn’t get released accidently. Point downwind; don’t let it get on your hands or clothes.

This collapsed pollinated bag is now very carefully slipped over only one branch and is then tied off tightly at the mouth around the branch stem with a twist tie or tape, sealing the pollen inside. Let the bag inflate slightly with air again before sealing it off, so the branch can breathe. This technique keeps the entire plant from seeding. Agitate the bag a bit after tying it off to distribute the pollen. Don’t forget to label the branch so you know which seeds are which. Other branches on this same plant can be hit with different pollen sources.

If no lighted closet is available, the plant can be moved back into the main room, but- be very carefulollen is sneaky. After 4-5 days, the bag is gently removed and the plant completes it’s flowering cycle.

Yet another method has worked well for me. I position the target plants in a non-ventilated lighted closet, and then I collect pollen on a piece of mirror or glass. This is then carefully applied to the pistils of one pre-labeled branch by using a very fine watercolor paintbrush. Care is taken to not agitate the branch or the pollen. No sneezing. The plant needs to be in place first; moving it after pollination can shake pollen free and blow this technique.

Regardless of technique, at completion you will have feminized seeds. Let them dry for 2-4 weeks.

About the chemicals:
Silver nitrate is a white crystalline light-sensitive chemical that is commonly used in photography. It is also used in babies’ eyes at birth to prevent blindness. It can cause mild skin irritation, and it stains brown. Avoid breathing. I didn’t notice any smell or fumes, but ventilation is recommended. Be sure to wash the spray bottle well before you use it elsewhere; better yet: devote a bottle to STS use. A half gram is a surprisingly small amount; it would fit inside a gel capsule.

.preparation of silver thiosulfate (sts) solution

silver thiosulfate (sts) is commonly used to block the action of ethylene in plant cell cultures. Ethylene is a hormone that is present in the gaseous state. Ethylene increases during senescence and ripening, and has been shown to increase in plant cell cultures due to wounding or the presence of auxins. Silver nitrate may be used alone to block the action of ethylene but it is not transported as well as sts thus is seldom used alone.

Prepare a 0.1 m sodium thiosulfate (sts) stock solution by dissolving 1.58 g of sodium thiosulfate (product no. S 620) into 100 ml of water. Prepare a 0.1 m silver nitrate stock solution by dissolving 1.7 g of silver nitrate (product no. S 169) into 100 ml of water. Store the stock solution in the dark until needed to prepare the sts.

The sts solution is prepared with a molar ratio between silver and thiosulfate of 1:4, respectively. Nearly all of the silver present in the solution is in the form of [ag (s2o3)2]3-, the active complex for ethylene effect inhibition.
Prepare a 0.02 m sts by slowly pouring 20 ml of 0.1 m silver nitrate stock solution into 80 ml of 0.1 m sodium thiosulfate stock solution. The sts can be stored in the refrigerator for up to a month. However, preparation of the sts just prior to use is recommended.

Feminizing seeds.

Okay I was asked about using STS or Colloital Silver to create feminized seeds. I know that I have read it here and many people on ICMag know what the process involves. However alot of people have never heard of it or other methods/techniques to create feminized seeds. So I thought a thread that combines the different methods/techniques in one easy to locate thread would be helpful.

When growing regular cannabis seeds, the resulting plants end up being about 50% male and 50% female. This can be a big disadvantage to the grower because male plants do not produce usable buds and generally must be discarded. However, if you create feminized seeds, then all the resulting plants will be female.

While there are a few different ways to create feminized cannabis seeds, for some people making your own feminized seeds may be impractical.

There are two main methods to create feminized cannabis seeds, genetically induced using the STS or CS (colloidal silver) methods or using the Rodelization method.

Probably the most common method used to create feminized seeds is to take a known female cannabis plant and force her to grow male pollen sacs and produce pollen. You can then take this all-female pollen and use it to fertilize other females. Because all the genetic material comes from females, you will end up with seeds that are generally about 99% female. Any male plants that do result when growing feminized seeds are probably genetic females that are growing with male characteristics.

There are several processes by which female plants will grow male characteristics. Some female plants will start growing male organs if they are left in flowering for too long, as a last ditch attempt to pollinate themselves since they were not pollinated by "true" male plants. Some female plants will also show male characteristics as a result of heat and light stress. But for the grower, the easiest, most reliable and most convenient methods to get a female cannabis plant to make pollen is to treat her with a solution known as colloidal silver, or STS.

Below I explain how to make feminized seeds using both STS, CS methods, then I’ll briefly explain the all-natural rodelization method, which is an all natural though less reliable way to get feminized seeds.

I have had this text file on my hard drive and various backups for around 10 years and honestly don’t remember where I got it originally. I suspect that either I copied it off of the internet or it was passed down from another grower. Now I am glad to pass it on again with my own modifications and tweaks.

The following is a safe, inexpensive, and successful method for reversing the sex of female cannabis plants. Individual plant responses may vary based upon strain, but I can verify that this process is fully effective in stimulating profuse staminate flower production.

This process can be used to:
A: create new feminized seeds from solitary prize mothers that you currently have
B: create interesting feminized-seed hybrids from different prize strains that you currently have
C: create feminized seeds for optimum outdoor use
D: accelerate the "interview" phase of cultivation, in searching for interesting new clone-mothers
E: reduce total plant numbers- great for medical users with severe plant number restrictions
F: increase variety, by helping to create stable feminized seedlines to be used as an alternative to clones

At the bottom of this post are some specific details about the chemicals used, their safety, their cost, and where to get them.

It is important to educate yourself about cannabis breeding theory and technique prior to using a method like this one.

It is also important to use basic safety precautions when mixing and handling these chemicals, so read the safety data links provided. The risk is similar to mixing and handling chemical fertilizers, and similar handling procedures are sufficient.

Remember: nothing will ever replace good genetics, and some of your bounty should always go back towards the professional cannabis breeders out there. the ones who have worked for many generations to come up with their true-breeding F1 masterpieces. Support professional breeders by buying their seeds.

Preparation of STS:
First, a stock solution is made. It consists of two parts (A and B) that are initially mixed separately, then blended together. Part A is ALWAYS mixed into part B while stirring rapidly. Use distilled water; tap water may cause precipitates to form.

Wear gloves while mixing and using these chemicals, and mix and use in a properly ventilated area. A mask will prevent the breathing of any dust, which is caustic. STS is colorless and odorless, and poses minimal health risks if used as described here. (See material safety data sheet links below). Note that silver nitrate and STS can cause brown stains upon drying, so spray over newspaper and avoid spilling.

Part A: .5 gram silver nitrate stirred into 500ml distilled water
Part B: 2.5 grams sodium thiosulfate (anhydrous) stirred into 500ml distilled water

The silver nitrate dissolves within 15 seconds. The sodium thiosulfate takes 30-45 seconds to dissolve.

The silver nitrate solution (A) is then mixed into the sodium thiosulfate solution (B) while stirring rapidly. The resulting blend is stock silver thiosulfate solution (STS).

This stock solution is then diluted at a ratio of 1:9 to make a working solution. For example, 100ml of stock STS is added to 900ml of distilled water. This is then sprayed on select female plants.

Both the stock STS and the working solution should be refrigerated after use, as well as the powdered chemicals, to avoid activity loss. Excess working solution can be safely poured down the drain after use (with ample running water) with negligible environmental impact. It’s pretty cheap.

Each liter of stock STS will make ten 1-liter batches of working solution of STS. With the minimum amount of base chemicals ordered from Photographer’s Formulary (see link below), this means that each 1-liter bottle of working solution STS costs less than 9 cents, and can treat 15-20 mid-sized plants. That’s 200 1-liter batches of STS for $18. Note that the distilled water costs far more than the chemicals.

Application:
The STS working solution is sprayed on select female plants until runoff. Do the spraying over newspaper in a separate area from the flower room. You probably won’t smell anything, but ventilate anyway. You now have what I call a "F>M plant"; a female plant that will produce male flowers.

I have discovered that using a stronger concentration of STS does not make a plant more likely to produce pollen. It just burns/stresses the plant. What DOES make a plant much more likely to complete it’s mission and make pollen is a second spraying at the end of week 2.

My conclusion is that STS in any concentration is only effective at inhibiting ethylene for about 3 weeks; at that point the plant’s natural female metabolism begins to take back control, and even a plant that is covered with male blooms doesn’t always finish the journey to manhood and produce pollen. A second spraying allows inhibition to last through week 6, which is more than enough time to release pollen.

After the F>M plant dries move it into 12/12 immediately. This is usually done three to four weeks prior to the date that the target (to be pollinated) plants will be ready to pollinate. Response times may vary slightly depending upon the strain. More specific times can be determined by trial with your own individual strains. In my application it takes around 26 days for the first pollen. 30-35 days seems optimum for planning purposes.

So, assuming that a target plant needs 3-4 weeks to produce fully mature seeds, a strain that takes 8 weeks to mature should be moved into flower at about the same time as the female>male plant. A target plant that finishes flowering in 6 weeks needs to be moved into flower later (10 days or so) so that it doesn’t finish before the seeds can fully mature.

A seeded individual branch can be left to mature on a plant for a bit longer, while harvesting the other seedless buds if they finish first. Just leave enough leaves on the plant for it to stay healthy.

Effects:
Within days I noticed a yellowing of the leaves on the F>M plants. This effect persisted for two weeks or so; after this they became green again, except for a few of the larger fans. The plants otherwise seem healthy. No burning was observed. Growth stopped dead for the first ten days, and then resumed slowly. No stretch was ever seen. After two weeks the F>M plants were obviously forming male flower clusters. Not just a few clusters of balls, but complete male flower tops. One plant still formed some pistillate flowers, but overall it was predominantly male.

It is strange indeed to see an old girlfriend that you know like the back of your hand go through a sex change. I’ll admit that things were awkward between us at first.

When the F>M plants look like they may soon open and release pollen, ( 3-1/2 to 4 weeks) move them from the main flower room into another unventilated room or closet with lighting on a 12/12 timer. Don’t worry too much about watts per square foot; it will only be temporary.

When the pollen flies, move your target plants into the closet and pollinate.

A more controlled approach is to isolate the F>M plants in a third remote closet (no light is necessary in this one, as they are releasing pollen now and are nearly finished anyway). In this remote other closet the pollen is very carefully collected in a plastic produce bag or newspaper sleeve and then brought back to the lighted closet, where the target plants are now located. If this is done, be careful to not mix pollen types by letting the F>Ms dust each other. Avoid movement, or use yet another closet.

Take special care to not let pollen gather on the outside of this bag- a static charge is sometimes present. Drop small open clusters of blooms inside and then close the bag at the mouth and shake. Important: next, step outside and slowly release the excess air from the bag, collapsing it completely, so that pollen doesn’t get released accidentally. Points downwind; don’t let it get on your hands or clothes. I always shower and change clothes at this point.

This collapsed pollinated bag is now very carefully slipped over only one branch and is then tied off tightly at the mouth around the branch stem with a twist tie or tape, sealing the pollen inside. Let the bag inflate slightly with air again before sealing it off, so the branch can breathe. This technique keeps the entire plant from seeding. Agitate the bag a bit after tying it off to distribute the pollen. Don’t forget to label the branch so you know which seeds are which. Other branches on this same plant can be hit with different pollen sources.

If no lighted closet is available, the plant can be moved back into the main room, but- be very careful: pollen is sneaky. After 4-5 days, the bag is gently removed and the plant completes its flowering cycle.

Yet another method that has worked well for me. I position the target plants in a non-ventilated lighted closet, and then I collect pollen on a piece of mirror or glass. This is then carefully applied to the pistils of one pre-labeled branch by using a very fine watercolor paintbrush. Care is taken to not agitate the branch or the pollen. No sneezing. The plant needs to be in place first; moving it after pollination can shake pollen free and blow this technique.

Regardless of technique, at completion you will have feminized seeds. Let them dry for 2-4 weeks.

About the chemicals:
Silver nitrate is a white crystalline light-sensitive chemical that is commonly used in photography. It is also used in babies’ eyes at birth to prevent blindness. It can cause mild skin irritation, and it stains brown. Avoid breathing. I didn’t notice any smell or fumes, but ventilation is recommended. Be sure to wash the spray bottle well before you use it elsewhere; better yet: devote a bottle to STS use. A half gram is a surprisingly small amount; it would fit inside a gel capsule.

Where to get the chemicals: photoformulary.com

silver nitrate: 10 grams: $10
sodium thiosulfate (anhydrous): 100 grams: $3.95
Postage runs around $4. Fast service. [verified!]

Have fun experimenting with this technique. Use it responsibly.

For what it’s worth, here is some information I found about sex-reversal in cannabis. This was printed in the memoirs of H.Y. Mohan Ram, found as a .pdf file which I discovered years ago and surprisingly it is still there.
Here is a link to the .pdf file: http://www.ias.ac.in/jbiosci/dec2002/651.pdf

He states that fertile male flowers can be induced in female cannabis plants using:
gibberellins (GAs) and anti-ethylene agents such as:
silver nitrate (AgNO3)
silver thiosulphate anionic complex (STS)
aminoethoxyvinyl glycene (AVG)
and cobalt chloride (CoCl2).

As this was an aside mentioned in the larger context of Dr. Ram’s life work, he does not go into detail regarding the methods of application of these chemicals to achieve the sex reversal. However the papers cited below do cover more details.

Mohan Ram H Y and Juiswal VS. 1972. Induction of male flowers on female plants of Cannabis sativa by gibberellins and its inhibition by abscisic acid. Plants, 105:263-266.

Mohan Ram H Y and Sett R. 1981. Modification of growth and sex expression in Cannabis sativa by aminoethoxyvinylglycine and ethephon. Z. Pflanzenphysiol., 105:165-172.

Mohan Ram H Y and Sett R. 1982. Induction of fertile male flowers in genetically female Cannabis sativa plants by silver nitrate and silver thiosulphate anionic complex. Theor. Appl. Genet., 62:369-375

Using Colloidal Silver to create feminized seeds:

* You’re able to produce feminized seeds using any two female cannabis plants (even clone-only strains!)
* You can produce seeds consistently
* You can control how many seeds produced
* Easy to make hundreds of feminized seeds if needed
* You can pollenate plants with various different male pollen

* You will need to find a source of colloidal silver. Your main options are: buying colloidal silver directly, buying a colloidal silver generator, or making your own simple colloidal silver generator yourself (instructions below)
* It is not safe to directly use/consume any cannabis which has come into contact with colloidal silver, though any seeds produced by a treated plant’s pollen are 100% safe.

When a female cannabis plant is treated with a solution of tiny silver particles suspended in distilled water, the plant will start to exhibit male characteristics. This solution of silver in water is called colloidal silver and can be purchased from a pharmacy/online or easily made at home. Some people drink colloidal silver for its health benefits and others use it occasionally on plants to help control bacteria, insect, and fungus growth on the leaves.

However, if you thoroughly mist a female cannabis plant with colloidal silver every day for 10-14 days around the same time that she enters the flowering stage, the concentration of silver ions in the water actually act as an ethylene inhibitor/antagonist on the plant, which forces the plant to create male pollen sacs instead of female buds. The safest way to ensure that your plants will actually turn into males is to keep misting the plants until you see the beginning of male pollen sacs forming. If growing indoors, you start misting the cannabis with colloidal silver when your first change the lights to 12-12, and keep misting her daily until the treated parts start showing male pollen sacs.

You need to let the sacs swell like a big empty balloon. You will be able to tell when they are about to open because the leaf section protecting the pollen starts to crack. At this point, simply take the pollen sacs off and place them in a cool dry place for a week and let them start to dry. The pollen will come out if you shake them about a little, or you can also cut open the sacs to get to the pollen inside. Use this pollen to pollinate female plants and you will get all-female seeds that are a mix of both their mothers.

This method is great because it will force almost any cannabis plant to show male characteristics. Unlike the rodelization method described below, you are not selecting for plants that show hermaphrodite traits. The genes of the plant are completely unaffected. This method will also produce a lot of pollen consistently compared to the rodelization method.

The one downside to this method is that it is not safe to use any cannabis that has come into direct contact with colloidal silver. You should therefore destroy the plant after the pollen has been collected. You will also want to ensure that you clean off any remaining traces of silver off your equipment in case you accidentally contaminate another cannabis plant with silver.

Here are the main things to keep in mind when using colloidal silver:

* Make sure you spray the cannabis with a strong enough colloidal silver solution (at least 30 PPM of silver)
* Spray the cannabis thoroughly to almost drench all the parts you want to turn into pollen sacs
* Spray the cannabis regularly, at least once a day for 10-14 days, starting when you change the lights to 12-12
* Spray the cannabis with colloidal silver every day until you see signs of male pollen sacs forming. Some hardy strains may need over 2-3 weeks spraying before they ‘turn’.

Where to Get Colloidal Silver:

Colloidal Silver is created by submersing two pieces of pure silver in distilled water, and then running a small DC electric current between the two pieces of silver. The electric current will cause silver ions to be deposited in the water thus creating a colloidal silver solution.

Buy Colloidal Silver: You can actually buy colloidal silver which has already been prepared and is ready for use. If you’re purchasing colloidal silver, try to find a solution that has at least 30 PPM (parts per million) of silver. However, I can imaging that buying Colloidal Silver that is already prepared could get expensive.

Buy A Generator Kit: Another option is to buy a relatively cheap colloidal silver generator to make your own colloidal silver.This Colloidal Generator kit usually comes with everything you need including silver wire. All you need to do is provide the water and a container.

Make Your Own: You can make your own colloidal silver generator at home. The diagram below should illustrate what you need to do.

* 9 volt battery (many people use 2 or even 3 batteries)
* 9v Battery Connector (less than $2 at a hardware or electronics store)
* Pure .9999 or 999 Silver (yes it must be pure)
* Distilled water (yes it must be distilled)
* Alligator clips (Optional: but will make things much easier)
* Soldering Iron (Optional: only needed if you want to use alligator clips)

The diagram above will show you how to easily make your own colloidal silver to make your own feminized cannabis seeds.

When you first connect everything, you may be surprised because it will seem like nothing is happening. You will know if it worked by the next day because the whole process will leave a silvery residue on your silver. You may need to use light sandpaper, brillo-pad, or something else rough to clean your silver each time after creating a batch of colloidal silver.

Remember to keep your resulting colloidal silver solution away from any light or it will deteriorate and turn a dark gray color. If this happens, then you can no longer use the solution for creating feminized seeds.

Avoid most problems when making colloidal silver by:

* using pure (distilled) water
* using pure (999/.9999) silver
* giving electrolysis enough time to work so you don’t get a weak solution (at least overnight)
* making sure the solution has as little contact with light as possible until you use it

How to Feminize Seeds Using Rodelization:

* All-Natural
* Very Simple
* No cost

* Unreliable
* May not produce many feminized seeds
* Passes unreliable genetic tenancies to Hermie.

The Rodelization method is all-natural and is the simplest and most common method to create feminized seeds, but it is also unreliable and may not produce much pollen. Basically, the premise is that some female marijuana plants will start growing male pollen sacs / sex organs if they’ve been left in flowering too long (past the peak point of harvest). This is a last-ditch attempt by the marijuana plant to pollinate itself so that it at least produces a few seeds. You can collect these male pods and use the pollen inside them to pollinate other female plants. You pollinate female plants by evenly covering their buds with the pollen after they’ve been in flowering for 2-3 weeks. Females that are pollinated in this way will start growing all-female marijuana seeds. If you’re very careful, you can pollinate only some of the buds on a plant which will produce seeds, and leave other buds alone so they can still be used for consumption.

This issue with this method is that some strains of plants never seem to grow male characteristics naturally. Additionally, with this method, you’re selecting for plants that have a natural genetic tendency to show male characteristics, (tenancy to hermie). This can possibly produce seeds that are more likely to show male characteristics themselves which generally isn’t what we want. Lastly, even when you do get male pollen sacs from a marijuana plant in this way, there tends to be a lot less pollen than from a typical male plant.

The one great thing about this method is it’s completely all-natural so you can implement this strategy with an organic grow.

I’d really like to meet an honest man.
But I’d have to lie to him cause I smoke pot."
______________________________ ______