sub for granite in gritty mix questions
I'm trying to hunt down the ingredients for Al's Gritty Mix for a dwarf Robada apricot tree that I've ordered.
I've been wading through some long threads and keep getting distracted but I'm making progress on finding out what I need and where to look for it. : ) I looked for an FAQ on the mix and didn't find one. Gardenweb has changed their format so if there is one, please link me to it.
I want my container to be light-weight because I need to be able to move it to a sheltered area when we get late frosts/freezes.
Granite sounds heavy so I'm wondering if there's a lighter substitute for that? Not sure I can find granite anyway. If I found foam packing chunks the right size, would that work as a sub? (As long as I make sure they don't disolved in water). Perhaps they would pack down in the mix rather than keep their shape. Bad idea?
I do know where to find poultry grit. Is that lighter or heavier than granite?
Any other tips on keeping it light-weight -or inexpensive? I'm going to try using a large cattle feed container and have also been looking for some kind of dolly to sit it on that doesn't cost more that the tree. : (