Outdoor Nut's Link
I read an older forum on here when I googled the question: Where to buy 0-20- 20 Fertilizer cheaply and/or How to mix 0-20-20 at home. I do not wanna go over all the chat here and ideas only a few of which were good/cost effective. I have found an answer I am sure all willl agree upon. You can mix 0-44-0 and 0- 0-50, which are both readily available cheaply, in equal parts and result with a 0-22-25 which based upon my extensive research is about as good as it gets! These items may be purchased for under $40.00 US from various seed stores found online.
https://www.seedworldusa.com/products/soluble-of-potash-0-0-50-granular- fertilizer-50-lbs
https://www.seedworldusa.com/products/triple-superphosphate-fertilizer-0-46- 0-50-lbs
These two 50 Pound bags will yield 100 pounds of product! Then 2 Bags each for 200 lbs, etc. you guys get it!
This is the best I can do for you guys who run strictly Clover Plots the only other advice I could give is Mow it back to 5 or 6 inches once a year and spray Clethodim 2E to kill the grasses/weeds, ONLY SPRAY THIS IN YOUR CLOVER PLOT. ONLY SPRAY ON A WINDLESS DAY!
Outdoor Nut's Link