transplanted it about 12 hours ago to it's final 10 liter pot, started droop immediately, it looked very good before this. maybe I transplanted too soon? how should I nurse it?
This happens to me all the time (a slight wilt/droop after transplant). When I transplant and water, it's like the plants go into a mild shock for 12-24 hours. The next day/light cycle they're fine.
It looks dry around the base of the plant and wet around the rest of the pot. Did you water in the center where the plant is after you transplanted it? Also you can sprinkle some rooting hormone on the root ball when transplanting next time too. My plants hardly ever experience transplant shock and I fray the root ball hard.