Hey everyone-

HUGE fan of the gritty mix (never tried 5-1-1). Anyway, I don't come here often but when I do I usually find people struggling to find the ingredients. This may not be TERRIBLY helpful if you want to local source things, but Bonsai Jack out of Florida has top-notch ingredients. I pulled my hairs out looking for good ingredients for my bonsai trees and I found bonsai jack and haven't looked back since. You can adapt his ingredients easily to fit your needs.

I'm STILL looking for a local source for my gritty mix but when I can't find anything or get frustrated I pull out my bonsai jack soil.

BTW-- it's pumice, lava and acadama mostly-- but I buy bark fines separately to add to water retention (no bark for my pines, some for my maples etc).

Oh and his website is just bonsaijack.com Super nice and quick to respond to questions-- free shipping over 100.