Watering, Feeding & Nutrients
Nitrogen
Nitrogen is an essential macronutrient that supports leafy growth and overall plant development. In cannabis, nitrogen is especially important during the early and vegetative growth stages.
What Nitrogen Does in Cannabis
Nitrogen is one of the primary macronutrients required for plant growth and is a fundamental building block of plant life. In cannabis cultivation, nitrogen plays a central role in the production of chlorophyll, the green pigment that allows plants to capture light energy and perform photosynthesis.
Nitrogen’s Role in Plant Biology
Biologically, nitrogen is a key component of amino acids, proteins, and enzymes, all of which are necessary for cell growth and metabolic activity. Adequate nitrogen availability promotes vigorous stem development, healthy leaf expansion, and rapid vegetative growth. Plants with sufficient nitrogen typically display rich green foliage and strong upward growth.
Nitrogen Needs During Growth Stages
Nitrogen demand is highest during the vegetative stage, when cannabis plants focus on building leaves and structural mass. During flowering, nitrogen requirements decrease, and excessive nitrogen at this stage can delay flower development and reduce bud quality. For this reason, nutrient formulas are often adjusted to lower nitrogen levels as plants transition into flowering.
How Plants Absorb Nitrogen
Nitrogen is absorbed by roots primarily in nitrate or ammonium form after being dissolved in water. Proper moisture, oxygen availability, and pH balance are essential for effective nitrogen uptake. If these conditions are not met, nitrogen may remain unavailable even when present in the growing medium.
Common Nitrogen Problems
Nitrogen-related issues are common in cannabis cultivation. Nitrogen deficiency typically appears as yellowing of lower leaves and slowed growth, while nitrogen toxicity causes overly dark green leaves, excessive foliage growth, and weakened stems. Managing nitrogen levels carefully helps maintain balanced growth, prevent stress, and support healthy cannabis plants throughout their life cycle.
Related terms:
Macronutrients, Vegetative Stage, Chlorophyll, Nutrient Deficiency, Nutrient Toxicity, Fertilizer, Nutrient Uptake, Leaf Color
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