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Grobo Support Center

Check out our Grow Guide for useful tips and tricks!


Planting A Seed

Getting the coco or peat pod moist, and making sure it remains moist during germination, is one of the most crucial parts of your setup.

  1. Place the pod in a bucket of water (Reverse Osmosis or Distilled) and get the air out by squeezing the pod underwater with your hand
  2. It should be dripping wet after this – but we don’t want it to remain this wet. Give it a good ½ squeeze to remove some of the excess water
  3. Place the pod into the white reservoir lid
  4. Push your seed into the small hole at the top of the coco or peat pod
  5. Tear a small pea-sized corner off of the side of the pod
  6. Gently cover the hole made for your seed with the piece of pod you’ve ripped off
  7. Ready set grow 🙂

We are trying to get the seed in contact with the pod on all sides to improve germination rates. If you find the pod is drying out, carefully pull the pod out of the cover and put it into the reservoir tank to make sure it stays moist until germination occurs!

What do I do if it dries out?
If your pod dries out, you can pull it out and dip it into your reservoir tank to get it wet again.

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The first two weeks are important for the life and health of your seed and seedling. Cannabis seeds pop in 12 hours to 14 days. Once the seed casing has absorbed enough water, the shell will split and the seedling will emerge. You will be able to see your root emerge from the bottom of the Coco Pod. You will be able to see it visually by lifting up the lid and peering at the bottom of the pod.

Two important things to remember;

  1. We want the pod to drip when we lift it if the root is not visible . Once the roots emerge from the bottom of the pod and is touching the water, your plant will be able to drink
  2. We want the pod to start to dry out after the roots touch the water. If your pod is too wet once your seedling has emerged, you run the risk of ‘damping off’

Damping Off
This is a disease that attacks young seedlings at the spot where the stem and growing medium meet. Your seedling will slow its growth and fall over.

If the root is in the water and your Coco Pod is slowly drying out, you will be fine. The system fills to a different level for those important couple of weeks after the root has found the water.


During this time you will see your plant start to take off and grow more and more each day, adding both height and additional leaves. When your plant reaches 4-7 sets of branches you have the option to top and lollipop it. Check out our Harvesting Cannabis video.

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Keep up the weekly reservoir change, your plant will reward you for it in the end!

Growing marijuana in grow tents

In this article we’re going to explain some basics about indoor cannabis cultivation in grow tents, one of the most popular options among those who just want to grow some pot at home for their personal use. Being highly versatile thanks to the wide range of available dimensions, you only need to keep several factors in mind to successfully harvest your own buds.

Indoor cannabis cultivation is easier thanks to grow tents

Lighting System

  • The lamps should be 50/60 cm away from the plants (with 600 wattsodium lamps), 35/40 cm away with 400 watt sodium lamps, and should be raised as plants grow, always maintaining the same distance from their tops.
  • During the growth period, marijuana plants need 18 hours of light and 6 hours of darkness for a fast and healty developement. This phase should last for a minumim of two weeks or until the plants are about 25 cm tall.
  • During the flowering period, marijuana plants need 12 hours of light and 12 hours of darkness (it is very important that plants are in total darkness). The length of the flowering period varies from plant to plant and it ranges from 50-70 days, depending on phenotypes. Normally, growers use HPS lamps, LED panels or LEC CMH lighting kits for this stage.

Ventilation of marijuana plants

The extractor fan must always be connected when the light is on. During the dark phase it should be connected during 15 minutes every hour, and during the last weeks of flowering you should increase this period to 15 minutes every half an hour. If humidity levels reach 90%, then the extraction fan has to be connected continuously.

It can act as “passive intractor” when temperatures are moderate, when we don’t need an intractor fan.

LED panels are great to keep temperatures under control

Temperature and humidity in the grow tent

The temperature in the grow tent should not exceed 31°C (maximum temperature) and should be above 17ºC (minimum temperature), although the ideal temperature is between 20 and 28ºC.

Relative humidity should not exceed 75% (maximum) and should’t be lower than 20% (minimum). The ideal humidity is between 40 and 60%. Sometimes it can exceed 90%, what shouldn’t be a problem if it happens only in particular occasions. A thermo-hygrometer is necessary to control these parameters in our growing space.

Plants must be watered according to their needs

Watering and fertilising marijuana

  • Marijuana seedlings need an abundant watering once they have been transplanted (½ litre per plant). A few days later, 150 ml of water per plant and day will be enough. A sprayer can be of great help.
  • At the start of the flowering period irrigation should be increased to 250 ml per plant and day.
  • During the last two weeks of flowering you should give your plants 150 ml of water per plant and day.
  • Before each irrigation, touch the potting soil. If the soil is still moist, wait for the next day to water again.
  • These instructions are just guidelines to help you find the optimal irrigation for your plants, which will vary slightly depending on several factors like temperature, pot size, etc.
  • Fertilise the plants every two irrigations, i.e. using tap water one day and nutrient solution the day after.
  • Fertilising should be done according to the dosage and feeding schedule recommended by the manufacturer.

Cannabis clones in full bloom

Phytosanitary treatments for cannabis

To avoid pests and diseases , it is advisable to treat your marijuana with pesticides, including insecticides and fungicides . The first treatment should done one week after the plants are in the grow tent, and the second treatment should be performed when the plants are one week into flowering.

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Comments in “Growing marijuana in grow tents” (29)

Nick 2021-06-17
Hi Tim! New grower here. I live in a hot and humid place that has no seasons, we do get rain and dry seasons . I was wondering about using a grow tent but Im not sure if it will be hard to keep a low temperature with such an enclosed environment specially in hot and dry seasons. How do you feel about using grow tents in this kind of environments?

Tim Alchimia 2021-06-21
Hi Nick, thanks for your comment and question. A grow tent offers many advantages, and near-complete control over the conditions is one of them. With adequate ventilation and air conditioning, you can create an ideal grow space, although it’s hardly the most sustainable way to grow cannabis as electrical consumption can be very high when attempting to battle high temperatures. A grow tent may be very useful for you in another way, because I presume that the outdoor photoperiod where you are is roughly 12/12 all year round, meaning that it’s hard to grow plants to a good size before flowering them. You could use the grow tent as a vegetative growth area before moving the plants outdoor to flower once they’re big enough. This method may not work during the wet season, but I’d imagine that cannabis would perform rather well in the dry season, as long as enough irrigation is available, and possibly some kind of shade during the hottest time of day. Yields are liely to be far greater with this method than finishng the entire flowering cycle indoors, where space is restricted. Personally, I’d be looking at equatorial sativas, either landraces from your area or those that come from a similar latitude. These are plants that have developed to thrive in tropical climate conditions and should give you the least amount of trouble. If in doubt. try and ask local growers what they choose to cultivate, if possible. I hope that heps, best wishes and happy growing!

K1 2021-04-07
Hello, Just a quick question. I’m a semi experienced grower who is thinking of starting back up again. I have a batch of Subcool’s Blueberry seeds that I’ve been saving, and I was thinking of busting out the mother tent and the 6 x 8 tents and doing a perpetual grow with those guys and some special ‘91 chemdawg cuts that my buddy is going to gift to me.. my problem is, I’ve always wanted to grow some serious tree sized plants, as usually I would either ScrOG or SOG my plants, (before I made my stink bud aeroponic units I’d just lollipop them and do a SOG, but after I got the hang of using the aeroponics I would top a few times and throw a screen over the tops and start weaving lol), but I want to see what they really can do. but I’m wondering if Subcool’s seeds are meant mainly for indoor growers, and has anybody had his genetics done in a decent sized run outdoors? Any info you can hook up would be appreciated! Thnx 🙂

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Tim Alchimia 2021-04-08
Hi, thanks for your comment and question. I didn’t know that Subcool had made a Blueberry, they should be very interesting indeed! His genetics are definitely suitable for outdoor growing as well as indoor, although I think he did all his breeding indoors. I’d guess that, as with most breeders, there’ll be varieties that are more suited to outdoor cultivation than others, depending on mould and pest resistance, size and general structure. Search for a YouTube channel called Mendo Dope, those guys have done huge outdoor grows using Subcool genetics, with some spectacular results. I hope that helps, best wishes and happy growing! PS. I bet those Chem 91 cuts will thrive in your aeroponics set up indoors!

James Dean 2021-03-08
So I am curious on what some people are doing with whatever nutrient line they’re running.. My buddy that’s a good grower but does outside greenhouse said I should add molasses, mamoth, photosynthesis and a veg Enhancer. Just wanted to see what your opinion is.

Tim Alchimia 2021-05-20

Hi James, thanks for your comment. Most indoor growers will pick a nutrient line and simply follow the feeding schedule for that particular brand, whether it be organic or mineral. Other growers prefer to use a well-fertilised super soil and then just use plain water and compost tea throughout the grow. Molasses are always a great addition to a grow as they act as food for beneficial microbes, boosting the life in the soil which helps the plants absorb nutrients more efficiently. Mammoth P is a popular microbial product and will help increase harvests by providing more Phosphorous to the plant. I’m not sure what the photosynthesis product is but a good veg enhancer would be Green Hope Booster Max.

I hope that helps, best wishes and happy growing!

Hashmagus 2021-02-09
Hey guys I am a new grower & was wondering if I use 250watt M/h and 315cmh with 4k bulb. Will I get better results. Than just using hps

Tim Alchimia 2021-02-10
Hi, thanks for your question. it really depends on the wattage of the HPS bulb you’re comparing it to. A good quality 315w CMH lamp, such as the Lumatek Aurora, will give comparable results to a 600w HPS in most situations, but with significant energy savings. I hope that helps. Best wishes and happy growing

Greg 2020-11-14
I have 2- 4×4’ tents and 1- 4×8’ led lighting in all with 2 fans in each tent. The 4×4 have 2 leds and the 4×8 has 4 leds. They have a switch for veg and bloom . Lights altogether cost 900.00 How many lights do I need in the tents? How should I use the veg/bloom switch? Do you use the veg and bloom at the same time and then switch to bloom as the plant matures? Or use each independently during each cycle of the plants life? Thank you

Tim Alchimia 2020-11-16
Hi Greg, thanks for your comment and question. To calculate the lighting needed in each tent you need to now the output of the LED lights in lumens. The plants will need an absolute minimum of 2,500 lumens per square foot, although 5,000 is much better, up to a maximum of around 10,000 lumens per square foot during flowering, which is roughly equivalent to natural sunlight. The Veg/Bloom switch will change the lighting spectrum from a more white/blue light suitable for vegetative growth to a more orange/red spectrum that is ideal for flowering. I hope that helps you out, feel free to ask further questions and we’ll all we can to help. Best wishes and happy growing!

wheatie 2020-08-10
hey tim for marijuana to be potent is it correct to let it cure forhowlong for sone strong potent marijuana thanks

Tim Alchimia 2020-08-10
Hi Wheatie, thanks for your question. Curing doesn’t really affect the potency unless the weed has been curing for a really long time, in which case much of the THC will have converted to CBN, resulting in a more heavy, stony and narcotic effect, but it won’t actually make it any stronger really. The main purpose of curing is to improve the flavour by allowing compounds such as chlorophyll, starches and sugars in the flowers to break down, making for a smoother smoke. The effect will also change slightly, from the up, speedy coffee high of freshly harvested weed, to a slightly more mellow and physical effect once the flowers are fully cured, depending on the variety. As a general rule, I find that Sativas and Sativa-dominant hybrids will benefit from a much longer cure of up to a year, while Indica-dominant varieties tend to only need a relatively short curing period and indeed begin to lose flavour quite quickly, sometimes after a few months. I hope that helps. Best wishes and happy growing!

James samuel 2020-08-03
Hey so i have a 3×3 tent and the temperature gets really hot becausw my 315w cmh light adds like 10 degrees celcius so it gets up to 32 degrees in my tent i was wondering if i can leave the front of tent open a bit so the hot air can be released will this have any negative effects om my plant?

Tim Alchimia 2020-08-04
Hi James, thanks for your comment and question. There’s no problem at all in leaving the door open while the lights are on, but you’ll need to make sure that the tent is sealed up again before the lights go out if you’re in the flowering period, otherwise you stand a good chance of stressing the plants and having hermaphrodite problems. I hope that helps. Best wishes and happy growing!

Justin 2020-02-05
Kids have a 48×48×80 I have a 1200 w led light it equals 600w is that big enough

Tim Alchimia 2020-02-05
Hi Justin, thanks for your question. I take it those measurements are in inches, right? If the lumens are equivalent to those of a 600w HPS (which I think is what you mean here, correct me if I’m wrong) then it should be just fine in that space, although LED lamps don’t tend to have as large a light footprint as HPS so you’ll need to verify how much the light spreads to be 100% certain in this case. I hope that helps, best wishes and happy growing!

leisa 2019-10-31
afternoon. how early can you start to add molasses to your babies

Tim Alchimia 2019-11-01
Hi Leisa, thanks for your question. If you want you can give your plants molasses in low doses from a very early stage, once a few sets of leaves have developed. It won’t act as plant food as such, but it will help to feed the beneficial microbes which in turn will improve nutrient uptake and efficiency in your plants. You can add molasses (making sure it’s the un-sulphured type) throughout growth, increasing the dosage as the plant develops, but it’s during the flowering phase when it will be most beneficial. All the best and happy growing!

frank 2019-09-26
I have a friend who got a 2×4 tent with 2 foot led light he wanted to know if he should get another light? he is using an LED 24W 6400k 60cm light, he is only going to be growing Indica if that helps at all.

Tim Alchimia 2019-09-30
Hi Frank, thanks for your question. Yes, your friend definitely needs more light in there! When it comes to LED lamps, we’d recommend a minimum of 50w per square foot, and up to 80w per square foot for optimum results. All the best and happy growing!

ludo Is an Alchimia client 2019-05-26
quel tent et quel plateau avez vous utiliser sur les images ? j’aimerai connaitre les dimensions car cela correspondrais à ce que j’aimerai avoir comme matériel ^^ je suppose 120X120 vue la dimension mais je suis pas sûr en cas le plateau à l’air l’argement mieux que le miens qui prend toute la box et qui me bouche mes arrivé d’air :/ j’ai un sytème growtool 1.2 et franchement même ci la surface prend toute la place, je suis déçu qu’il couvre mes entrer d’air que cela soit passif ou la chaussette d’intra :/ merci pour les info à venir

Tim Alchimia 2019-05-27
Bonjour Ludo, Il s’agit bien d’une box et d’un plateau de 120x120cm. A bientôt

Matthew Mcneil 2018-09-15
Getting ready to order a tent and start growing. 4×4 And would like yo buy a complete set up. Light, balist, filter, fan all in one shot. Can you recommend any certain brand or how I should go about it?

Tim Alchimia 2018-09-19
Hi Matthew, thanks for your question. The best thing to do is to check out our selection of Grow Tent Kits, which include all the equipment you’ll need to start growing. We have several kits including a 120cm (4×4) tent, priced depending on the size of bulb you want and how much money you want to spend. If you have any more questions, don’t hesitate to get in touch, happy growing!

Ryan S C 2018-07-19
And I have gone for ak49 auto fems and northan lights auto gems What’s the best nutrients to use any help would be appreciated

Tim Alchimia 2018-07-24
Hi Ryan, good choice, I’m sure you’ll do great with those seeds! As far as nutrients go, personally I’d recommend to use organic nutrients from a company like BioBizz or BAC which will provide an easy-to-follow feeding schedule. Alternatively Bio-Technology produce an auto nutrient kit specially formulated for Autoflowering plants. All the best and happy growing!

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Ryan S C 2018-07-19
Hi everyone i have just set my 120/80/160 tent up with 600w led and 5inch extractor fan an carbon filter how many plants would you recommend i could do in that it’s my first time growing

Tim Alchimia 2018-07-24
Hi again Ryan, with them being autos, I think I’d go for between six and eight plants in that space. It really depends on the final size they’ll grow to, and while autos tend to be on the smaller side, there are exceptions.

Clara 2018-04-29
I’ve been growing about 15 clones in a horses stable with a 1000w highlider and a 600w. Lights have been on 24/7 for the last 30 days and before that for about 3-4 months with lights on 18 hour a day. I would like to get ready to flower The stable is an open room and the plants are in 4-5 gallon pots What’s the best way to go for setting up for flower? Please help anything will b appreciated. What kind of tents and appliances will I need? Thanks

Tim Alchimia 2018-05-02
Hi Clara, thanks for your question. To set up for flowering you’ll need to create a lightproof space for your plants where they only receive light when you want them to. Without seeing the stable it’s hard to say what to do, some people would put up a quick dry wall to enclose the space but if you’re not that way inclined I’d recommend a grow tent. It sounds like your plants will be quite large after 4-5 months vegetative growth, so I’d recommend a larger tent to ensure they have enough space. Our 240×120 Alchimia Box is a great option. It’s also available as a full kit, including lamps, fans, ventilation and everything else you’ll need, here’s the link: Alchimia Box 240 basic kit. All the best and happy growing!

J R Greentrees 2018-03-09
Does it matter where on the tent you attach the in line extractor? We have a tent with holes at both top and bottom. Also, could one vent the extracted air up through a chimney? I have a powerful extractor that used to be part of an extraction set up for a school forge, and the extraction chimney was pretty tall, as I recall.

Tim Alchimia 2018-03-13
Hi, thanks for the question. Ideally you’ll vent from the top of the tent to evacuate any hot air, but it can work fine either way. Venting the air up a tall chimney sounds like a great idea, but I’d still recommend using a carbon filter to avoid the smell being spread over a wide area! All the best and happy growing!

JR Lautner 2018-02-18
I am starting a 2x4x60inch grow tent. I have a four inch carbon filter kit and 2 600watt leds 277 true watts each. This will be in my michigan basement die to the moist cold air in the basement I am going to draw the intake air from a room on the main level. I will be moving the air about 12 ft with a big drop to the bottom of the tent. I purchased a 4 inch In line duct booster fan will this work for me

Dani Alchimia 2018-02-19
Hi JR Lautner, You should have no problem. I’d recommend you to use a 2-speed fan, so you can switch it in case you need more fresh air inside your grow (which usually happens in summer). Still, you can try with the fan you purchased, I think it’ll work properly. Best!

Tom 2018-01-21
I’m new to growing I need help I tried many time to grow but every time I try at the first stage the plant die I use 160 wat and a humidifier the temperature 25 humidity 60 only to plants , what should I do Thanks , advance

Tim Alchimia 2018-01-22
Hi Tom, thanks for your question, sorry to hear about your plants dying. those numbers sound fine though, so it must be something else that’s killing them. Without more information on your grow it’s impossible to say what it is, but one of the most common mistakes made by beginners is over-watering, which deprives the roots of oxygen and stunts growth terribly, often killing plants. Allow pots to dry out a little between waterings and get used to the weight of the pots when they’re properly irrigated, that way all you’ll need to do is to lift each pot and if it feels light, it’s time to water! Have a look at our article on watering for some more information on the subject. I hope that helps out, good luck with your next grow, let us know how it goes please! All the best.

Sid Strandberg 2017-10-03
Im thinking of having perhaps 4 plants in a tent ( making them pretty big) how much Watt do i need on my LED for best grow? Im thinking about roleadro 300W but is it to low for 4 plants i found another one that has 1000W ( all the watt is measured on LED basis) Or does it depends on the size of tent? what size for A good tent for 4 plants, 300w/1000W LED? And regarding the seeds, i have grow Bubblegum before, but i guess now when im doing indoor i should be doing Indica because they will fit better in the tent? or you have sativia strains that does not get to height in lenght? feel free to suggest some strains. I would also need nutrients, soil and all of it hehe.. Thank you for the help!

Dani Alchimia 2017-10-04
Hi Sid, Let’s imagine a 1,2 x 1,2m grow tent, which would normally require a 600W HPS lamp. If you can use 2 x 300W LEDs, light distribution will be perfect, much better than if you’re only using a single lamp, and yields will probably be higher than with a standard HPS light. When growing indoors, any pure strain (either Sativa or Indica) is a bit more difficult to grow than hybrids, since in most cases they’re not properly adapted to artificial lighting. Moreover, some pure Sativas are too vigorous and tall for indoor grows, while some pure Indicas take too long to grow and remain too short. For their characteristics, Indica/Sativa hybrids and Sativa/Indica hybrids are the most grown type of strains indoors. About nutrients, I’d suggest to start with something easy. Use some quality soil and slow-release organic nutrients like Biotabs or GH Feeding (Biogrow + Biobloom + Enhancer work great. ). In this way, you’ll only have to use water + some bacteria to irrigate the plants. Hope it helped!

Dai7642 2017-08-28
My tent is way to hot I am using a 600watt light with a light cooking reflecter. No matter what I do the tent heats up to over 90. Degrees.

Tim Alchimia 2017-08-29
Hi, This is a relatively common problem in summer, indeed I know many growers that simply don’t grow indoors during summer to avoid just this problem! I’m not sure what the exterior temperatures are like where you are but one easy step you can take is to change the hours on your timer so the lights go on at night, when the exterior air is cooler, so the ambient temperature will be lower. Make sure your cool-tube ducting (insulated ducting will help lower temps too) is venting to the exterior well away from where you’re pulling the fresh air into the tent, and to make the extraction more efficient, make sure the ducting is as straight and direct as possible, without too many twists and turns which would reduce airflow and make the fans work too hard. Is the ballast for the lamp inside the tent? Can you move it outside? That would certainly help too. If these measures don’t make any difference, then you could look into cooling the tent with something as basic as a bucket of ice, or if that’s too simple, then maybe look into a portable air conditioning unit that you could direct into the tent. I hope that’s some help, happy growing!

Darren Bullimore 2017-04-22
I am new to growing i have 2 20ltr oxy pots with 600 watt led and 2 smaller150 watt led full spectrum have advanced nutients micro grow bloom also sumo dragon force nutes my grow tent is 80 x80 x160 and have black orchid extracto and carbon filters and small quiet running 6″ clip fan please any help or advice also i have amhurst sour diesel photoperiod fems seed and big bang fem auto seed stock autos for oxy pots sour diesel in coco cour 10 ltr pots for outdoor thanks in advance

terry222 2017-03-31
Outside plants receive a decent amount of nighttime light, why do indoor plants have to be in “total darkness?” thank you.

Dani Alchimia 2017-04-03
Hi terry222, Excellent question! Outdoor plants are used to a changing environment, they have sunny days, rainy days, cloudy days, and different moon phases. They adapt to these conditions and react accordingly. On the other hand, indoor plants have much more constant environmental conditions. It must be said that they can also tolerate a certain amount of light during the night period and bloom normally, but it is always better to avoid light sources since indoor plants are more sensitive to environment changes. That’s why complete darkness is always recommended, so you don’t take any risk of stressing the plants. Hope it helped!

Levi Daniels 2016-10-05
I just started growing andemand I plan on using the scrog technique. Is it wise to just do this with a 400w Apollo grow light without a tent? Is a tent really necessary for better yield? I’ve been watering my seedlings once every 2 days and I am currently using a 3800 lumen led light for 2 plants. I feel like the light isn’t too imperative this early in the grow stage but once I have the money I do plan on getting the Apollo. With this relatively simple setup will I need a grow tent, good ventilation and temperature for better yield?

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Dani Alchimia 2016-10-06
Hi Levi, As you say, light is not so important during the first stages of the plant, but it is imperative to get good yields once into flowering. Grow tents have been designed to keep a good environment for the plants while protecting them from light sources during their night periods. Thus, they’re very convenient but not strictly necessary, especially in regard with yields. What you do need is a good light source (the Apollo 400W would be ok) and proper air renovation in the growing space (and of course controlling the temperature and humidity). These basic tips for indoor gardening should be useful for you. Hope it helped!

Naomi 2016-08-02
My plants have also got purple lines going up true them does this mean they are stressed someone give me tips I don’t l ow what to do, help??

Dani Alchimia 2016-08-17
Hi Naomi, Check the min/max temperatures inside your grow room, plants normally develop purple hues when exposed to low temps, also if they’re stressed somehow. Also, keep in mind that many strains develop purple colors naturally, which is not a problem at all! Hope it helped.

Naomi 2016-08-02
Need help the leaves on the end of my plant have turned yellow and it’s not because their dry I have checked that just wondering what else coul it be and what can I do to help?

Dani Alchimia 2016-08-17
Hi Naomi, If you mean the lower leaves of the plant, then you need to add more nitrogen to your nutrient solution. Using any fertilizer formulated for the growth stage should solve the problem. On the other hand, if you mean the upper leaves it could be caused by the heat emitted by the bulb. Placing it a bit further from the plants should lower the temperature of their tops and allow plants to grow normally. Hope it helped! 😉

Naomi 2016-07-26
One question I’ve recently started growing I’m just wondering is it normal for water to be at the end of my tent from the steam or should I dry it?

Dani Alchimia 2016-07-27
Hi Naomi, I don’t know if I understood your post correctly. When you say at the end of the tent, you mean you have water condensated on the walls of the grow tent? Or is the water not coming from condensation but from a humidifier? If you have water drops on the walls of your tent caused by condensation, that means you should improve your air extraction system. If it comes from a humidifier, simply adjust it so it produces less vapor. Hope it helped! 😉

Bethany Taylor 2016-01-25
papa indica, I’m preparing to purchase my first grow tent but am unsure as to the size I will need. I bought a 400w hps bulb with air cooled reflector. I only need enough yield to supply my husband and i with a big enough harvest to last until next harvest which is usually around 4-5 oz. We have been growing with CFLs in our closet and i wanna make sure we use our money wisely when purchasing a tent. We have 3.5 gallon containers. If i get a 4’x2’x6′ tent, will this be enough space for 2 plants? (2 sq. ft. per plant) If so, will these 2 plants yield what we need? I ask this because we have 3 plants in the closet that yield around 4 oz combined.

Dani Alchimia 2016-01-27
Hi Bethany, I am currently growing in a 4’x2’x4′ grow tent with two 250W lamps and air cooled reflectors. My plan was using a 400W lamp, but when I checked light intensity with a luxmeter I realized that light distribution was better with two smaller lamps. Still, and since a 400W light produces more lumens than a 250W, you won’t have major issues regarding this. The number of plants depends on growing systems and techniques: you can use the SOG technique and put about 12-16 plants in your space, or you can grow larger plants and use 2-4 plants (SCROG technique). It is up to you, each systems has pros and cons. As you can see, yields do not depend on the number of plants used, but on their size: the idea is always covering the whole growing surface with buds. Hope it helped!

Papa Indica 2015-07-06
One thing to avoid whichever style of reflector you use is the ones that have a smooth reflective surface. The smooth surface doesn’t reflect light evenly and can cause major hot spots. The dimpled surface reflectors distribute light much more evenly and eliminate hot spots. Reflectors should have their own discussion here, there are lots of points to be made on the subject. And I’m glad you like reading my opinions Dani, because I usually have one. :^]_

Papa Indica 2015-07-03
In my experience, a wing style reflector is the worst choice for tent growing, they seem to be better for more open spaces. Earlier on in my growing career I was using LED’s, near the end of that I had an HPS user friend of mine jealous of my results with them but, in the end, replacement costs were just outrageous compared to just replacing a bulb, or even a ballast. So, when I decided to switch over to HID lighting I bought a kit for my HPS set-up that included a wing reflector. I HATED that thing, the heat build-up in my tent was ridiculous, I had to dial my 600w ballast back to 50% power to try and keep it under control. By my second crop with HPS I had an enclosed reflector with my exhaust fan ducted to it to draw the heat out directly from the source. HUGE difference. I was able to bump back up to my full 600w and heat hasn’t been an issue ever since. But, also bear in mind that I’m using duct fans, not inline fans, so granted my fan may have just not been powerful enough to keep up the other way, though it seems to have plenty of pull to me. And by the way, I definitely get better results now with my HPS than I did with LED’s, I guess my friend is just a step behind. But anyway, to me, the enclosed reflector that you can duct your exhaust fan to is far superior to a wing for tent growing. (I have lots of opinions, don’t I?)

Dani Alchimia 2015-07-06
Hi Papa Indica, We just love reading your opinions!! 😉 While I haven’t used duct fans but inline fans, I’ve also realized that the difference between wing reflectors and enclosed reflectors is huge, not only speaking about light reflection, but especially heat dissipation. Again, thanks for your comment. All our best vibes!


The comedian loves to celebrate life in very unique environments. But mainly naked on a snow mountain.

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