Spawning 2x2 large trees (4 saplings in total) will not work. I have not tested to see if the biome affects the ability to spawn, but I'd assume not. I have tested the dark oak and the spruce trees and neither will grow; I am growing them in a plains biome. My tickspeed is set at 9, which may affect this problem, but again, I am not sure. The areas around the four saplings are bare of any vegetation, etc.
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Duplicate of MC-179909
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I'm having the same issue. 2x2 Dark Oaks will not grow in my Plains biome. I spammed bonemeal as well for a bit and still didn't grow. I tried replanting still they do not grow. How can I get my precious dark oak logs!?!?