NuGro is the company that manufactures the 10-4-6 that I use. Their website is
www.nugro.com and you can find info on their ferts there. The 10-4-6 contains 0.056% Dithiopyr and nutrient sources come from; urea, monoamonium potash, and muriate of potash. Application rate is 10lb/1000sq.ft.