|A greatwood tree.|
The wood gathered from these trees can be put to much the same use as normal wood, but enchanting it in an infuser yields more than normal wood would. 
Greatwood logs come from Greatwood trees. The Axe of the Stream has an easier time cutting these down since Treecapitator does not work on Greatwood trees.
Greatwood Trees naturally will spawn when there are more than 6000 Aura in a Forest Biome.
The saplings only grow when the aura in the chunk is greater than 7000 need more testing. Tested to work around 8000 vis in the chunk with 1 Greatwood Sapling needed. Grow time varies, and bone meal does not work.
Greatwood tree always grow to a 2 x 2 tree. They can grow without space between trees but, as with the normal trees, branches over the sapling affect the final height. Branches of the Greatwood tree can grow up to 6 spaces from the tree.