Quote Originally Posted by Perp
You're not going to be able to leave the plant in there, unless it's a clone. A seedling needs fresh air. It's better if you take the jar off.
My test plant is a pineapple top I've been sprouting since Sept. Fresh greens just started in past few weeks.

I've since added 3 x 1/2" holes in the bottom section as well as replaced the 23W with a 14W, and now I have convection (of sorts) doing some air transfer, and no steep heat gradient.