Plant Deficiency Chlorosis

Chlorosis refers to the yellowing or whitening of plant foliage due to insufficient chlorophyll production, commonly observed when cannabis plants experience nutrient deficiencies—particularly nitrogen, magnesium, iron, or zinc. This visual indicator is not a genetic trait but rather a physiological response to growing conditions, soil chemistry, or root health problems. Breeders and cultivators monitor chlorosis patterns as diagnostic markers for nutritional imbalances or environmental stress. Understanding chlorosis helps distinguish between genetic leaf coloration (anthocyanin expression, variegation) and stress-induced discoloration. Proper soil amendment, pH management, and nutrient scheduling typically resolve chlorosis before harvest.

Breeders track chlorosis susceptibility across genotypes to identify lines with efficient nutrient uptake or stress resilience. Cultivars showing premature or severe chlorosis under standard feeding regimens may indicate weaker root vigor or nutrient-transport genetics worth noting in breeding selection.