What does it do?
Iron has a number of important functions relating to a plant’s overall metabolism and is essential for chlorophyll synthesis.
What do you see?
Strong yellowing, especially of younger leaves and growth shoots starting near the petiole and gradually working outwards.
What can you do?
Add a chelated iron enhanced fertilizer to your nutrient solution or foliar spray with the same fertilizer, such as Cal/Mag Plus or Mineral Matrix.