Hello all. New to the forum and looking forward to some great advise from site members. Here is a question I hope to get an answer for. I had a conversation with an older gentleman this weekend concerning growing tomatoes. He gave me a recipe for a homemade liquid that he sprays on his plants once a week to aid in disease resistance and to grow stronger plants. One of the ingrdients he wrote down is "Pickling Calcium". I searched the net and cannot find anything simply called pickling calcium. Does anyone have an idea what he may be refering to? He also has written down "calcium" sepperate to the "pickling calcium" as if it's 2 different things. Can to much calcium hurt plants? The amount is a tablespoon each to a gallon water.There are other ingredients but the calcium has me a bit confused. Thanks in advance.