Leaf Margin Necrosis

Leaf margin necrosis refers to the browning or death of tissue along the edges of cannabis leaves, a condition commonly observed during cultivation. This symptom can arise from multiple environmental, nutritional, or genetic factors, including high salt concentration in soil, inconsistent watering, low humidity, or nutrient imbalances—particularly calcium or potassium deficiency. Breeders and cultivators distinguish between environmentally triggered necrosis and genetic predisposition to edge-leaf browning. Documentation of margin necrosis is important for phenotype tracking and environmental optimization in breeding programs. Understanding whether necrosis is cultivar-specific or environment-dependent helps inform both strain selection and growing protocols.

Breeders monitor leaf margin necrosis when evaluating genetic stability and environmental resilience across generations. Strains showing consistent margin necrosis under controlled conditions may warrant selection work to improve nutrient uptake efficiency or stress tolerance.