Micronutrients Iron Manganese Molybdenum

Iron, manganese, and molybdenum are essential micronutrients that support enzymatic function and nutrient metabolism in cannabis plants. Iron drives chlorophyll synthesis and electron transport; manganese activates photosystem II and aids carbohydrate metabolism; molybdenum enables nitrogen fixation and nitrate reduction. Deficiencies in these elements typically manifest as chlorosis (yellowing), stunted growth, or pale new foliage, depending on severity and plant stage. Breeders and cultivators track micronutrient uptake patterns as part of phenotype expression—some genetics show stronger mineral-use efficiency across varying soil compositions. Understanding these trace elements helps optimize growing conditions and express desired plant architecture.

Breeders select for micronutrient efficiency to develop lines that perform consistently across diverse growing media and nutrient schedules. Strong iron, manganese, and molybdenum uptake often correlates with vigorous vegetative growth and stable flowering phenotypes.