Vegetables, fruits and herbs mostly. I've tried the store bought seed planter greenhouse kit things and some things I have good success with but most things I dont. My tomatoes and peppers get an inch or 2 high and then die. Maybe it's something I'm doing wrong I'm not sure. But the purpose of this project is because I don't have anywhere inside my house to really get a good light source and I think that may be part of the problem, so this will move my operation outside with hopefully better success.