 to develop the root systems and fight off these fungal infections such as tomato blight. So you would simply mix one tablespoon of the fertilizer to one gallon of water and water it in at the base of the plant. And this can be applied once a month during the growing cycle. And some of the things that I'm seeing, I have 29 tomato plants in my garden and they're all kind of doing something a little different, but I have seen some yellowing of the leaves.