>> If they're in cells, I wait until they really are getting root bound.
That is what I'm doing now. I use prop trays with 50 or 128 cells, or the "six-pack" tear-apart inserts with 72 cells. Maybe I'm waiting TOO long. I'm squeamish about root balls falling apart and (presumably) ripping root hairs and small roots. But I'm sure it doesn't make a plant happy to be 110% root-bound.
I own two trays with 20 narrow "rows" ... that seems like an interesting compromise between single-cells and a big flat. When I started, seed starting, I used some small flats. Pricking the tiny things out did work, but pulling tangled rootlets apart made me uncomfortable! As if I could hear them scream.
>> time lapse seedling
Thanks, Allison & Karen !
