@farmerman,
I never did any of that b1 stuff, tough love y'know. I cut off (or pull down, as the case may be) the bottom crust of the bound roots and made some slits up the sides (if there are sides, which doesn't happen in flats except at the edges..) and stick them in the presumed good soil with a nod and some water. On the other hand, I'm not much of an annuals person so may not be versed on their particular needs. Dys was, the man loved petunias and marigolds and so on, happy making.
I need to transplant the Caesalpinia gilliesii (bird of paradise bush), something I've liked since my california days, from the back yard to the front. I waited too long, the heat came too fast this year, and I'm a lazy bum in the early mornings and a weary soul at twilight, at least re digging and planting. My soil is really just sand, and I plant with stuff that will live in it - but the Caesalpinia doesn't mind that (famous last words).