Finally I've got a larger greenhouse so I can put every plant in a larger separate pot. The small nursery really was limiting their growth by now, so repotting was imperative. During repotting I was able to see some relatively large aerial roots:
There was a couple seedlings which have grown symmetrically sharing one cell:
I decided to practice in pruning on them. Anyway, they have tangled their roots so much that it was impossible to separate them without some damage.
Next day after root pruning, the first one (with fewer roots left) have withered a little. I believe that's because smaller root system can't maintain the same amount of leaves. So I've pruned their tops as well. After cutting stem ooze a little of nice white sap:
I've slip potted all the rest of the plants without much invasion, except for a couple of smaller ones, which have fallen behind their little brothers, like the one here. These I've just pulled out like carrots and put them into freed nursery cells. I should get rid of them completely if they don't catch up with others.
This is how greenhouse looks like now:
Larger volume requires more power to heat and more effort to keep humidity high, but after some experiments I've managed to achieve 98% RH and 24°C.
