Chlorosis Nutrient Deficiency

Chlorosis refers to the yellowing or blanching of plant foliage caused by insufficient chlorophyll production, typically linked to nutrient deficiencies—most commonly nitrogen, iron, magnesium, or zinc. In cannabis cultivation, chlorosis appears as interveinal yellowing (between leaf veins remain green while tissue between yellows) or uniform pallor, depending on which nutrient is deficient. Chlorosis is not a genetic trait but rather a physiological response to growing conditions, yet understanding how cultivars express stress responses remains valuable for breeding resilient stock. Some genotypes show faster visual recovery or greater tolerance to marginal nutrient regimens than others, making chlorosis response a secondary breeding consideration. Documentation of chlorosis resistance can inform cultivar selection in resource-limited or low-input growing systems.

Breeders sometimes evaluate seedlings or mature plants under controlled nutrient stress to identify lines with robust nutrient uptake efficiency or visible stress tolerance. While not a primary trait, selecting for chlorosis resilience indirectly supports vigor and adaptability across variable growing environments.