I just started growing cucumbers from a Topsy Turvy grower, and the plant seems to be doing okay. I used the Topsy Turvy grower because I live right next to the beach and anything I try to grow dies due to high salt content and such in the soil. My problem is that a lot of the leaves are turning brown around the edges, and have spots on them. I treat the plant with insecticide to keep bugs away, although there have been some sugar ants. Someone told me that it looked like a deficiency of Iron. Is there anyone who can help with this or tell me what I could do to get the plants more iron?
Side note, I tried being ironic, and that didn't work.