According to this website, "pure" KNO3 fertilizer is graded 13.8-0-46.5
http://www.haifa-group.com/products/...te_fertilizer/
A few years ago, another forum member told me a great way to synthesize KNO3 -
http://castboolits.gunloads.com/show...atchlock/page2
Does your government restrict ammonium nitrate and potassium carbonate?