I make my own based on how many lb of each element wanted per 1000 sq ft. The raw materials are 21-0-0, preferably spray grade, potassium nitrate, monopotassium phosphate, and dry soluble chelated micronutrients. I will add liquid 28-0-0 if I want a slow release N in the mix. Otherwise it is applied every 30 days to warm season grasses.
They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety.
Benjamin Franklin 1775
Sell not virtue to purchase wealth, nor Liberty to purchase power.
Benjamin Franklin Poor Richard's Almanac1738