PlantMicronutrient.
An essential nutrient needed in smaller quantities, such as iron or manganese.
What it means for your plants
Small required amounts do not mean unimportant. Deficiency-like symptoms can also result from pH or root problems, so do not add concentrated trace elements based only on leaf color.
IN PRACTICE
A fertilizer’s guaranteed analysis may list micronutrients separately from the NPK numbers on the front.
Put it into practice
Decode nitrogen, phosphate, and potash on fertilizer labels and learn why concentration, dilution, and micronutrients matter.
NPK numbers explained: reading a fertilizer label