Bonemeal can spawn trees in overworld

To bring overworld and new nether mechanics in line How when you use bonemeal on mylium blocks it can spawn fungus, which when bonemealed again can turn into warped trees I suggest the same can be done with grass, so perhaps the dead bush can spawn randomly when bonemealing grass, then when bonemealed again can turn into the tree type of its current biome (other than the 2x2 type)