Size of grit
I'm planning to use Al's 1:1:1 gritty mix next season for my (outdoor) dahlias. A trip to my feed store showed that they carry poultry grit in several sizes of the particles, depending on the size of the critters being fed (chicks, chickens, turkeys, emus--just kidding). I'm sure the optimal size of the pieces was covered somewhere in this forum, but I'm darned if I can find it (being new here). So if anyone has that information at hand I sure would appreciate your posting it. Incidentally, I'm planning to re-circulate the drainage from the containers on a daily basis, a sort of modified modified hydroponics set-up. And I'd love comments, criticisms, and suggestions on my scheme. Thanks, all.