Are you still interested in new .json for 1.12.2 ? I'm well aware that Forge has left 1.12.2 behind, and if you have moved on also, I'd wholly understand.

At any rate, it's half a dozen trees for "Plants" (https://www.curseforge.com/minecraft/mc-mods/plants), mentioned in #22. Four overworld, two nether. Five to nine shapes each, I didn't really count.