Should I get any calcium? Will I need it later? Calcium nitrate, calcium acetate, calcium phosphate, or calcium carbonate? What is the difference other than some are more water soluable? I have a granular fertilizer (2-7-4) with 7% calcium (it has bonemeal in it) and fish hydrolysate (2-4-2) with 1% calcium, and Epsom salt. Should I use them all the whole year or do I change it when they start flowering/growing pods? I usually do 1/4-1/2 of the strength it says. Should I water with tap water that has calcium carbonate and other stuff or use rain water? They are in the ground.