Aside from regular nutes, you need something with a good amount of Ca in it, not a mild fert', unless this product states that it's a Ca-Mg supp'...? ..not familiar with this product! Your symptoms aren't that severe, , but I'd go for both in any case... one thing about foliar,... a type of product called a water spreader, or wetting agent make doing this far more effective: this stuff makes whatever you spray coat the leaves evenly, instead of beading up... simply put, the more surface area covered = more absorbed by the plant! I know, yet another product to buy,..$$$ LOL! But, it's worth it, and a little goes a long way, and can be used for any solution you make... do you have access to Ca-Mg supplements, or molasses?