Why not just go to the drug store and get some Potassium Nitrate? Or head on down to the local feed store. You should find it in stock there. I live in Portland Oregon, in the middle of the metro area and I have at least 6 places within 5 miles of my house that sell or can order Potassium Nitrate. Not a one of them is a garden center, or a big box Home store of any kind. Semper Fi