Your fertilizer SHOULD have micros in it, and those will be listed in small print on the back. A hint on foliar feeding- mix your ferts weaker than normal, and add a drop of liquid dish soap. Mist lightly, allow to dry, and check back in half a day. Mist again, and monitor the plants to see how they respond. If there are brown patches, those won't heal, but if the leaves just have yellow or purplish discoloration, that should start to fade back to green in a couple days. Generally, you don't want to spary to runoff with most sprays. I do it with pyrethrin when I have to fight thrips, but otherwise, I try to use a fine, light mist and repeat it every 12 hours or so until I either see improvement or decide that it's not going to help, lol!