How can I grow trees underground? [duplicate]
Possible Duplicate:
Can trees grow without sunlight?
Ok, so I'm trying to plant this tree underground and it's surrounded by torches and directly under a 4x4 sky light. It's a normal sapling on 5 deep dirt. I've used like, 10 bonemeals on it and it isn't working.
Am I doing something wrong?
Trees need 7 blocks above them to grow, depending on sapling type. They also have a minimum horizontal requirement as well. Hollow out more space. If you use bonemeal and nothing happens, then you don't have enough space.