I'm just wondering which is best to use as the bulk of bonsai potting mix. These seem to be all I can get locally and it gets expensive to order potting mix online.
Dry-stall is pumice (or at least pumice-like, it just says lightweight volcanic aggregate), napa oil dry is diatomaceous earth.
Cost doesn't really matter as both are inexpensive, although I'd prefer one with less dust/fines to sift out.
I'm mostly wondering which is better for the plaints, which lasts longer before breaking down - also which has a larger particle size.
Dry-stall is pumice (or at least pumice-like, it just says lightweight volcanic aggregate), napa oil dry is diatomaceous earth.
Cost doesn't really matter as both are inexpensive, although I'd prefer one with less dust/fines to sift out.
I'm mostly wondering which is better for the plaints, which lasts longer before breaking down - also which has a larger particle size.