Few pictures - before and after - could help...

Also, temperature and light differentials: from what to what? (You mention a "greenhouse."

Need to start in a shade and defused light in the beginning NOT in FULL SUN..

Sey

"Take it out of its greenhouse". Explain please. What do you mean by "greenhouse"? The only thing I can think of that would cause a plant to wilt within a few minutes is either it is root bound in its container or there is a drastic change in temperature.

Dave

Be sure the soil is moist but not soaked. Take it out of the "greenhouse" for good and start in the house by a window that catches morning sun (continuing supplemental lighting the whole time). I'm thinking your "greenhouse" is some sort of plastic dome, which should have been removed shortly upon gemination. When it holds up to that for several hours indoors, then start it gradually outside, and always begin use morning sun when it is more humid and lower in the sky.

Pictures would help as mentioned but I think the answer will still be the same. Hopefully the plant is healthy and has had sufficient light to develop so far. A fan or breezy place is also helpful if you have one by a window. Good luck :)

PC

if by greenhouse you mean you have a seed starting system with plastic dome as sold in the stores. then the dome must be immediately removed as soon or even before the seeds poke above ground and fresh air from then on. putting the dome over the seedling will make it unable to survive. it will most likely get damping off disease from the high humidity and flop over and die. look closely at the stem at the ground level. if the diameter of the stem is smaller then it has damping off and will die. no way to save it once it gets damping off.

damping off is why people use sterile soil to germinate seeds. they are looking for soil that is free of the damping off disease.