Dark Wood Oak Saplings don't grow using bonemeal many time.
What I expected to happen was...:
I thought it would eventually grow.
What actually happened was...:
It wouldn't grow when I attempted it.
Steps to Reproduce:
1. Place Dark Oak Sapling down.
2. Use bonemeal it repeatedly.
3. Doesn't ever grow.
Environment
Put your operating system (Windows 7, Windows XP, OSX) and Java version if you know it here
You need a 2x2 of saplings for the Roofed Oaks to grow :/ Bonemeal one and all 4 grow.