Hi, Ken.
I'm using Stuewes' TP49 "short one" tree pot, which is 4" wide x 9.5" high.
https://www.stuewe.com/product...
I have found that their height is about the same as the #2 pots that I am using, but of course the #2 pots are wider. I have already "up" potted some seedlings from these tree pots into the #2 pots. Unfortunately, I have found that the rootball is
so tight, that the only way to get the seedling out of the pot is to cut the pot open with wire cutters. (Thus, these pots are something of a "use-once" commodity to me.)
I am using the #2 pots for the "next step" (from either the tree pots or from my "new" seedling bed(s)) seedling evaluation. (This next step is a sanity check for flower form and opening and also for rust resistance.) At this point I don't want to put the seedlings either into the ground (as if I had the space) OR into larger (more space-hogging, unsightly) pots; the #2 pots (on the other hand) fit very nicely into some plastic window box planters on my patio, where the nursery pots are somewhat hidden. I can fit 3 x #2 pots into a box. Since I don't have many seedlings that reach this first step, so far this has worked out. (I fear that may change shortly.)
