You want Osmocote PLUS, which is an entirely different animal than the regular stuff. I looked in all the big box stores when I bought mine and only found it at the local AG co-op. It's not nearly as common as the regular stuff, and it's a lot more expensive here. The half gallon sized jug I bought was around $18. I would guess you'd have to source it from a farmer's co-op type of store or online.