Its a homemade mixture. 2 parts Trace Mineral Salt 1 part Dicalcium Phosphate 1 part Mix-n-Fine Salt I was told not to mix it together until right before you use it, not sure why. I bought everything in 50 pound bags at Fleetfarm. I think I paid around $40 to $50 for all of it. I have 3 sites that I use it at, and I do it twice a summer. (I just did it about 3 weeks ago for this year, and I will freshen it about mid summer sometime.) I just finished up last years batch this last time out, so I got a year and a half out of the 200 pounds, using it at 3 spots.
