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cannabis seed production nutrients

Which are the best nutrients for marijuana seeds?

Nutrients are the compounds that the plant absorbs in order to build its tissues and perform the metabolic activities necessary for its survival. Carbon, oxygen and hydrogen are assimilated by air and water. The rest of marijuana nutrients are taken from the substrate and the nutrient solution. There are different types of nutrients and these can be grouped according to the proportion needed by the plant. In this guide we will group them into macronutrients, secondary nutrients or micronutrients. We will define in detail each of the macronutrients and the typical deficiencies and excesses that may occur.

Primary or macronutrient nutrients: nitrogen, phosphorus and potassium

The nutrients that the plant consumes in largest amounts are called macronutrients and are nitrogen, phosphorus and potassium. All three are mobile, which means that if they are lacking, the plant will take them from other parts of itself. If this occurs, the effects of this deficiency can be identified in the older leaves.

Each of the macronutrients will be analyzed in detail, as well as the typical deficiencies and excesses that may appear.

Nitrogen

Nitrogen (N) is the most soluble of the macronutrients, meaning that it leaches the most easily and can be assimilated by the plant most rapidly. Because of this, it is necessary to replenish this nutrient regularly. It often appears in the form of nitrates, and various ammonium compounds. Nitrogen is the major component of growth fertilizers and is necessary for the synthesis of nucleic acids and essential amino acids needed for the formation of new tissue,.

An excess of this nutrient causes an increase in the internodal distance, a stretched or ‘leggy’ growth pattern, with dark green leaf coloration. In addition, the excess growth promotes soft tissue susceptible to attack by insects or fungi.
To solve a problem of excess nitrogen, simply perform a root wash (leach) with twice as much water as the plant container has. We can also leach until the EC of the drainage water is less than 1.6 – 1.8 μS / cm.

A lack of nitrogen causes the oldest leaves to turn yellowish in colour. The nutrient is mobilized from these to the newly formed tissues producing inter- venal chlorosis (yellowing between the veins).
Nitrogen deficiencies produce pale green or yellow plants with little growth vigor.
The deficiencies in this case are easily corrected by adding growth fertilizer to the irrigation.

Phosporus

All living things make use of phosphorus in the form of ATP (adenosine triphosphate), a nucleotide with a high energy bond that is released when the phosphate bond is broken. This element, besides being essential for the energy of the plant, serves many other functions in plant physiology, especially in the production of resin.
ATP is used for photosynthesis, it´s a component of the DNA chain and is particularly essential in germination, cloning, seedling and flowering phases.

Excess phosphorus is often identified late, as the plant makes much use of this element and can withstand high levels. The most notable characteristics of an excess of phosphorus usually present as deficiencies of the elements zinc, iron, magnesium, calcium and copper. The most common symptom is usually the chlorosis of the veins with burns at the tip of the leaves.
To treat phosphorus toxicity, leach with a complete but very soft, (very diluted) fertilizer solution, around 5-10% of the normal amount, using a triple volume of water to leach the volume of the growing medium.

Lack of phosphorus causes developmental delays, with smaller, bluish-green leaves. Necrosis spots will appear and the stems, main nerves and petioles acquire a purple colouration. Later the leaves will start twisting and fall.

It is especially important to look out for a possible lack of phosphorus, since it will cause a delay in flowering, and the flowers will be smaller and not very numerous.

In many cases, the deficiency is caused because the pH of the irrigation water is above 7.00, values at which the absorption of phosphorus is limited.

Potassium

Potassium, among other functions, is involved in the processes of carbohydrate mobilization, helps in the synthesis of proteins, and is essential in all stages of the plant.
It promotes the development of roots providing more resistance against fungi and bacteria.

Excess potassium is difficult to detect since the effects of toxicity hinder the absorption of other secondary nutrients and trace elements. The plant thus acquires the appearance of a lack of the elements whose absorbtion have been slowed. Likewise, the confusion can be reversed, so that a lack of magnesium, manganese, iron and zinc, leads us to think that there is an excess of potassium. However, this can be corrected by leaching with a solution of complete fertilizer diluted to 5-10%, that is, the solution is prepared by adding one tenth of the recommended dose and using a volume of solution that is three times the volume of the container or planter.

The lack of potassium is not initially detected, as the plants retain their appearance as healthy specimens with small spots of necrosis on the leaves that turn a dark yellow colour and fall after curling upwards.
The deficiency may be due to the accumulation of salts at the root level, since it is present in almost all soils and substrates. To treat the problem is leached to entrain the salts and then a complete fertilizer is added.

2. Secondary nutrients: magnesium, calcium and sulfur

The secondary marijuana nutrients are magnesium, calcium and sulfur, the salts of which are present in tap water. They are also known as trace elements or microelements, are indispensable in the synthesis of chlorophyll and participate as catalysts in many metabolic reactions. They are needed in very small quantities and it is very easy for excesses to occur. These deficiencies are common occurances in grows in which reverse osmosis water is used. This problem is usually corrected by mixing the osmosis water with running water until the electrical conductivity has a value of about 250 μS / cm.

Magnesium

Magnesium is the element at the centre of the chlorophyll molecule and plays an essential role in the transformation of light energy into vegetable matter. Excess magnesium is not easily detected, but it is also not frequent. When magnesium reaches toxic levels, conflicts with other ions, especially calcium, occur. This is the only real issue it can cause. Magnesium deficiency is common in acid soils, where the pH is less than 7. It produces yellowing between the leaf nerves between the fourth and sixth weeks of growth, although aside from this the plant will appear healthy. Then the tips of the new leaves will burn, and bend upwards. This problem is solved by adding one cup of dolomite limestone to every four litres of substrate in the initial transplant blend or by adding Epson salts at each irrigation.

Calcium

The calcium needs of cannabis are almost as high as those of the macronutrients. It is the element that maintains the stability of the cellular membrane helping the correct transport of nitrogen and sugars. An excess of calcium prevents the correct absorption of potassium, magnesium, iron and manganese. Special attention should be paid to overfertilization at the beginning of the plant´s life, since it could impede correct development. Deficiencies are fairly common in industrial hemp crops but rare in self-cultivation; they are also quite difficult to detect. Abnormally slow growth is one sign, with yellow areas in newly formed tissues, weak stalks, and an inhibition of correct inflorescence growth leading to a lower yield. To treat a deficiency of this element we recommend a teaspoon of hydrated limestone for every four litres of irrigation water.

Sulphur

This nutrient is essential in the synthesis of amino acids like cysteine ​​and methionine. It is also part of vitamin B1 and many hormones.

Excess sulfur with low conductivity levels usually presents no problems. However, in cases of high conductivities, high levels of sulfur blocks the assimilation of other nutrients.
Symptoms of excess include limited development, small-sized leaves and dark green stems. The edges of the leaves may appear burnt.

To treat this toxicity, a leachate is applied with a very diluted fertilizer solution, ensuring that the volume of leachate is at least three times the volume of the container used.

The deficiency causes the leaves to turn yellow between the nerves, losing turgidity in a similar way to a lack of nitrogen. The tips of the leaves twist down and burn, beginning with the oldest leaves first.
This is normally a symptom of too high pH or an excessive amount of calcium.

The treatment for sulfur deficiency is to lower the pH to 5.5 – 6.0, and add inorganic sulphur to a fertilizer containing magnesium sulfate. Animal manure is a good organic source of sulphur,

3. Micronutrients

Also called trace elements or microelements, these are indispensable in the synthesis of chlorophylls, and act as catalysts in many metabolic reactions. This group of elements is composed of zinc, manganese, iron, boron, chlorine, copper, cobalt, molybdenum, silicon, nickel, sodium and fluorine. They must be present in minute quantities, and excesses can easily occur. Hydroponic fertilizers are often helpful because they have a balanced proportion of micronutrients. The microelements that are often under the desired limits are zinc, iron and manganese. This deficiency mainly appears in crops whose soil or water has a pH higher than 6.5.

From Kannabia Seed Company, as a marijuana seeds bank, we would like to state the following items in accordance with current legislation in force in Spain:

  1. That cultivation should only be for personal supply and consumption.
  2. That the use and purpose of your cultivation must be therapeutic.
  3. That the plantation should be carried out in the privacy of your own home, similarly the consumption.

And most importantly, all information that is given references a small cultivation. If you want to buy marijuana seeds, we’re the best option for you.

Essential Nutrients for Cannabis Growth

Like all plants, cannabis has specific requirements to achieve its most successful levels of growth and production. For recreational and commercial growers alike, the consistent introduction of essential nutrients for cannabis growth – during each phase of plants’ life cycles – is necessary to produce a successful and repeatable crop.

Essential Nutrients for Growing Cannabis Plants

Essential nutrients are divided into three groups. Macronutrients are required in large quantities. Essential secondary nutrients are required in small quantities. Essential micronutrients are required in still smaller quantities. However, all of the nutrients are essential to plant health and crop production.

Essential Macronutrients

While Oxygen (O), Hydrogen (H), and Carbon (C) are rarely lacking in soil, water, and air; three other macronutrients often need to be added to the growing medium:

Nitrogen (N)

  • Needed for plant growth, foliage development, and protein production.
  • Necessary to the chlorophyll molecule that gives plants their green color and is essential to photosynthesis.

Phosphorus (P)

  • Essential for root, flower, and seed development.
  • Essential for energy transfer between cells and throughout the plant.
  • Essential to photosynthesis

Potassium (K)

  • Aids in water absorption.
  • Regulates the opening and closing of stomata.
  • Required in the production of Adenosine Triphosphate (ATP) which drives many processes in the living cell.

Essential Secondary Nutrients

While Essential Macronutrients are needed in large quantities for optimal plant growth, Essential secondary nutrients are also required in smaller quantities. They are, however, essential to plant growth and health.

Calcium (CA)

  • Necessary to transporting other nutrients.
  • Necessary to the absorption of nutrients.

Magnesium (Mg)

  • A component of Chlorophyll and therefore photosynthesis.
  • Assists in the metabolism and transportation of nutrients throughout the plant.

Sulfur (S)

  • Necessary to the transport of chlorophyll.
  • Aids with plant metabolism.
  • Essential to the transportation of other nutrients.

Essential Micronutrients

Essential Micronutrients are needed in much smaller quantities than either essential macronutrients or secondary macronutrients. They are essential to plant life and successful crops.

Boron (B)

  • Necessary to the absorption of zinc (Zn).
  • Helps to transport calcium (Ca).

Manganese (Mn)

  • Necessary to chlorophyll production.
  • Necessary to photosynthesis.
  • Helps enzyme interactions.

Zinc (Zn)

  • Necessary to the development of stems, leaves, and branches.
  • Required in larger quantities as the plant matures.

Copper (Cu)

  • Strengthens the limbs and branches of the plant.
  • Necessary to the development of plant proteins.

Iron (FE)

  • Necessary to Chlorophyll production.

Molybdenum (Mo)

  • Necessary to process nitrogen.

Cobalt (Co), Chlorine (Cl), Silicon (Si), and Selenium (Se)

  • Necessary to the support of all plant life.
  • Sources do not agree as to whether they should be included in the list of essential nutrients. However, they should appear in any nutrient mix.

Balance of Nutrients and pH

Plants need a correct pH in order to absorb and use nutrients well. As with all plant production, the needs of individual plants vary by the plant’s phase. A newly rooted plant will need a different balance of nutrients than a flowering plant.

The ideal pH of the growing medium must be maintained. The pH is a measure of acidity or alkalinity of the soil or growing medium. A soil or growing medium that is either too acidic or too alkaline will impede plant growth and crop production.

Ideal pH for cannabis in

  • soil is 6.0 and 6.5.
  • Coco Coir 5.5 to 6.5.
  • hydroponic setups 5.5-6.5.

pH testing kits are widely available alone or as part of DIY soil testing kits.

What to Look for in a Cannabis Nutrient Mix or Kit

Cannabis nutrient mixes and kits are available for most growing mediums. There are a few considerations when choosing a nutrient mix and when to use it.

  • Make certain that you have had your soil tested and know the pH of the soil before adding nutrients. This information will allow you to make precise decisions about nutrient additions.
  • Nutrient mixes are called N-P-K mixes or Nitrogen (N)-Phosphorus (P)-Potassium (K)
  • In the growing phase, an N-P-K mix high in Nitrogen (N), medium in Phosphorus (P) and high in potassium works best.
  • In the flowering phase an N-P-K mix low in Nitrogen (N), medium to high in Phosphorus (P), and high in Potassium (K) works best. This is because a mix high in Nitrogen can discourage bud development.
  • Check that you are purchasing a nutrient mix and not a supplement mix. Supplement mixes have very low N-P-K ratios.

More About Essential Nutrients for Cannabis Growth

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Do my autoflowering weed seeds need additional nutrients? I was told by the company that sold them to me that nutrients aren't required, but from my 20 years of experience, I don’t see how they don’t need nutrients. I will be eagerly waiting any advice.

Autoflowering cannabis is the third type of cannabis (Ruderalis genetics) that evolved originally in short summer locations. Autoflowering cannabis doesn’t have a photoperiod sensitivity so it will flower about 15-22 days after germination and, depending on the variety, harvest is between 50 -100 days. Because it has this significantly different life cycle, fertilization is different as well. So, you must load inputs to get top performance and yield. Micronutrient minerals are essential for rapid root expansion, so the following growth has the means of absorbing nutrients. Minerals are necessary to balance the N-P-K inputs, so having them in the growing medium is essential for maximum growth stimulation. You can also add beneficial microbes. The microbes make the micronutrient minerals more available for absorption and together cause massive root branching and strong top growth. And it’s probably a good idea to use a B-vitamin like Organic B or B-52 all along the cycle to keep stress and fertilizer shock to a minimum since you are pushing the plants for maximum yield.

Growth: First off don’t transplant them, there’s no time to waste on transplant shock so just germinate them in the medium they will be harvested in. A good container is the 420 one-gallon grow bag on Amazon for great oxygen delivery to the roots for a huge root ball to pump nutrients into buds that works with the short grow cycle. Keep the light soft at the beginning with T-5 high-output fluorescent and switch to LED or HID in a week after the first leaves come out and raise them as the plants grow. And don’t have the light too close to the plant tops. If the leaves curl, it’s too close. They need at least 18 hours of strong light with a full spectrum in veg and bloom so choose illumination based on day-spectrum charts. A combination of metal halide and high pressure sodium is an easy fix to this requirement. Autoflowering cannabis only gets to about 48 inches tall, so LEDs provide great light as well from start to finish. Back off the red-light frequencies in sodium for the last 48 hours before you harvest to max out THC and terpene production.

Fertilization: Nutrient application is started slowly in the first week (like half strength). At two weeks start using potassium silicate for structure growth that will support large calyx growth. Thereafter ramp up the feeding during the first two to three weeks using a pH-balancing formula. At the first sign of flowers do a small flush with reverse osmosis or distilled water, then switch to a high-yield simulator. Add a bloom booster to max out your calyx formation.