Can't plant dark oak saplings

That is because dark oak trees need 4 saplings placed in a 2x2 square to grow, bone mealing 1 sapling won't work because their trunks are 2x the size of an average tree.

That is because dark oak trees need 4 saplings placed in a 2x2 square to grow, bone mealing 1 sapling won't work because their trunks are 2x the size of an average tree.