A couple of my tomatoes showed signs of blossom end rot. This is usually caused because the plant is water stressed or it is not taking up enough calcium. I am pretty sure that my tomatoes are getting enough water, so that only left a calcium deficiency. So I mixed up 4 cups of gypsum and 2 tablespoons of borax and applied it to my growbox. I then watered it in. I hope that I do not see anymore end rot.
