It’s true. I have used it as a foliage spray for container tomatoes & peppers and it stops blossom end rot (which is due to a calcium deficiency) immediately. I also include 1/2 cup of Epsom Salts in the initial potting mix for containerized tomatoes/peppers.
Well, that’s good to know — I’ll have to look up blossom end rot now — don’t think I have that yet - but the season’s young isn’t it. Any cures for cut worms?