Hmm.. Epsom salt would work with mag but not cal. At this young stage still, I wouldn't know how much to use in a foliar, but I would probably go wayyy light, like 1/2 a teaspoon /gallon, or maybe even just a pinch. Molasses should be pretty safe with 1 or 2 tsp. I'd probably do 1 tsp. I wouldn't cut off the leaf yet, but it will probably die. The plant will still use it somewhat.