OK, I've got my NPK worked out using a mix of UFLEXX 46-0-0, Haifa Potassium Nitrate 13.5-0-46 Multi K, Growth Products Liquid Phosphorous 0-30-0 and Growth Products TKO Phosphite 0-29-26, so I think I have my Macros covered. Where I'm running into problems is figuring out the most cost-effective way to add Sulphur, Iron and other micros to the mix. My area is primarily heavy clay, alkaline soil that suffers from Sulphur and Iron deficiencies pretty much constantly so these I'd like to be able to apply with some regularity and the other micros a couple of times a year in small amounts. We're treating 98% St Augustine, 1.99% Bermuda and .01% Zoysia. I'd prefer to have a dry product that is soluble just because they're easier to store and the dry versions tend to be less expensive than the liquids. Growth Products has some solutions but they're pretty pricey so I'm looking for alternatives. My sales rep is helpful but he comes from the golf world so isn't as well versed on the options for liquid application. Thanks in advance for the help.