So, because I'm a curious fellow I've been working on cave trees/bushes introduced recently (Poppycaps, Towercaps, and Witherstand). Poppycaps and Towercaps worked as-expected (besides showing up as a tree in the pot, which was kindof funny). However, Witherstand refused to plant inside the cave once sprouted in the pot. I eventually decided to try them outside and sure enough, they planted outdoors just like any other bush. This really feels like a bug, as they are cave-native and just plain look wrong when growing outdoors.
Oh, and I'm curious, is it intentional that Towercaps take 20+ days to mature, and witherstands take weeks to bear more withercorn? Seems a bit excessive, but It's fine if so, just curious.
Loving more stuff in caves in general!