Cool hairy scape on the D. tomentosa, RL. 'Looks healthy to me. I just planted some seed of that species for the first time so now I know what I, hopefully, have to look forward to.
A deep pot test is a great idea, NaN. I'm guessing you have the same species in shallow and deep pots, correct? No doubt most of us here have ideas on the subject but some actual comparative data would be a good thing.