Dew

Look at this beauty I found today:

Plants in the new greenhouse are growing well. Even the one used to be dried 3 weeks ago now has recovered fully. It has shed 4 leaves, but new ones are growing fast and at almost didn't lag behind the others:

Here is the largest seedling so far:

It's stem is turning brown and almost woody:

Thorns or whatever it is on most plants are slowly growing, but it's still unclear what's their purpose:

BTW, putting thermometer-hygrometer permanently in the greenhouse didn't work perfectly. It helped me to balance ventilation vs temperature and humidity in the first day, when I ended up closing almost all vents. But couple days later it was filled with condensate and hygrometer failed, it shows random value now, even if I can read it:

I also have fertilized them today. Here is a full group shot:

New formations

Almost all plants started to develop some strange thorns in leaf nodes. Can these be aerial roots? I intentionally keep them in 100% humidity and warm temperature, but can aerial roots start to grow that early?

Also, it's been two weeks since fertilization, so I fed them again.

Fertilizing and first branch

It's been 3 weeks since first sprout, so it's time to fertilize. Most manuals say don't fertilize in winter time, but I've got heated and alight nursery, so I believe my plants need to be fertilized.
I've got some liquid bonsai fertilizer which contains nitrogen, phosphorus, potassium and some metals (4-6-6 NPK). So I diluted it as instructed (5ml per liter of water, I had to use precision scales to measure it) and watered plants generously. Hopefully it's for good.
So far seedlings grew well, some of them developed many leaves. That's the latest overview of the nursery:

Couple plants which have germinated 10 days ago, they've barely grown at all. Apparently, they're not vigorous enough, that's why it took them so long to germinate in the first place. Compare them to their sibling which is just 10 days older:

There were no new sprouts since then, so I've scrapped leftover seeds.
And here is the largest plant so far:

It already have developed a small branch (just above first pair of leaves) and generally grows like a tree, in asymmetric fashion.