MG Fertilizer additions
Ok, so I have a box of the 24-8-16 miracle grow, that has everything but calcium, magnesium, and sulfur. I use FP 9-3-6 for my houseplants and such, but for the annuals outside, I'd rather not waste my FP. So, to make Miracle Grow complete, I need calcium, magnesium, and sulphur. Can I add gypsum and espom salts right to the water to accomplish this? Gypsum is calcium sulfate, and epsom salt is magnesium sulfate, so with this combo, would I be adding all three? If this is feasable, how much per gallon would I be looking to add??
For what its worth, I have some things in 5-1-1, which does have the lime, so I should be good there, but some are still in nursury pots with who knows what for soil. I also have my bonsai trees, but they are in gritty mix, and pampered with Foliage Pro rain water. I just want to make use of the MG I have, and if it works good, it would be a low cost fertilizer plan for the not-so-important hanging baskets and annuals. Thanks!