Managing Micronutrients in the Greenhouse (NC)
Excesses Can Cause Deficiencies. Excessive application of micronutrients probably accounts for more micronutrient disorders in the greenhouse than does insufficient application. Excessive application of micronutrients, in addition to toxicities, can lead to micronutrient deficiencies. Deficiencies in this case are due to antagonisms between micronutrients during plant uptake. When two nutrients are antagonistic, a super-optimal concentration of one in the root medium will suppress plant uptake of the other.
Source: • North Carolina Flower Grower's Bulletin Vol. 35 no. 5