I know there are a few posts in this, but everyone seems to be different.
I had lavender in my garage under a growing light in a 12inch diameter pot that was doing great. I watered it lightly (a misting twice a day).
I moved outdoors today, 60F and sunny. I gave it a decent watering. 4 hours later, it was wilting really badly. I did noticed the pot I used didn't have drainage. I drilled a hole and moved it back inside, now it's looking good after 3 hours under the light.
I can't tell if the problem was:
The shock of moving outside/reaction to the sun
The pot not draining/too much water
Type of soil (I used potting mix)
Any thoughts appreciated.