Bonemeal is very messed up. When used out of a dispenser, it uses up to 64 bonemeal to grow a tree. The same happens for placing manually.
Comments 3
I beg to differ. I have tried the same thing and the tree has plenty of space but it wont grow no matter how much bone meal I used. This is with a dark wood sapling.
See MC-36408
If the tree has trouble growing (because of a confined space), it can take many bonemeal.