Depend on species too. I experimented on my one of viking seedling, as early as 1st small pitcher. Transfered to small 3cm pot, washed to the side of pot by heavy rain
, then moved back to center again. Now it's producing second pitcher
. 3 of them opened cover under direct morning sun for few days, started turned yellow, moved back and green pitcher appear in the center. So recovery of viking seedling is good. But for the rest my seedboxes, I'll leave them covered up maybe for another 6month before doing anything crazy, or stupid
.