The azalea was added in the 1.17 Caves & Cliffs update. It can be spawned by using bonemeal on a moss block. It may spawn along with moss carpets, moss blocks, and tall grass. When bonemeal is used on it, it will grow into an azalea tree, with azalea leaves. The dirt beneath it will become rooted dirt. For more information, go to: https://minecraft.fandom.com/wiki/Azalea