Why Cannabis Plants Need Nitrogen

In the context of NPK (Nitrogen, Phosphorus, Potassium), the "N" represents nitrogen, which is needed by Cannabis plants in the largest quantities. It is a crucial component of many plant structures and is vital for various metabolic processes. Nitrogen is necessary for growth, reproduction, and the production of amino acids.

Plants absorb nitrogen in the form of water-soluble ammonium and nitrates, which their roots readily take up. Nitrate nitrogen is the most common form found in fertilizers because it is quickly absorbed by plants and has good soil retention. Cannabis plants require different amounts of nitrogen at various stages of their lifecycle, so it’s important to use the appropriate nutrient feed for each growth phase—whether it be propagation, vegetative, or flowering.

What Does Nitrogen Do For The Plant?

As a key element in plant proteins, nitrogen stimulates growth, promotes fruit development, and supports the formation of plant tissues and cells. Additionally, nitrogen is a component of nucleic acids, which form DNA and help transfer traits to new plants.

Nitrogen is also vital for chlorophyll, the green pigment required for photosynthesis. Plants that receive adequate nitrogen experience higher rates of photosynthesis, resulting in larger, faster, and healthier growth. Furthermore, nitrogen helps maintain and optimize the root system.

What Is A Nitrogen Deficiency?

Nitrogen deficiencies can occur due to underfeeding or nitrogen leaching from the growth medium. If the pH of the medium rises too high, it can prevent the plant’s roots from absorbing the nitrogen they need. Excessive levels of potassium, zinc, manganese, and chloride can also hinder nitrogen uptake.

A nitrogen deficiency may manifest if the plant’s root system is damaged, diseased, or exposed to low temperatures. To identify a deficiency, look for pale green or yellowing leaves, stunted growth, and poor fruit production. Affected plants will also be more susceptible to diseases and pests.

Growing in a hydroponic system or using coco coir can reduce the risk of nitrogen deficiency. If a deficiency does occur, increase your nutrient feed strength gradually—by 1 ml at a time—until the leaves return to a rich green color. You can also use a nitrogen booster or a foliar feed to expedite recovery.

Cannabis plants require nitrogen in large quantities, typically around 10-60 grams per kg of plant mass. It plays a crucial role in plant health, making it the most essential nutrient for supporting growth. As a vital element for all life, neither plants nor animals would thrive without it.

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