Green Rain and Tree Farms.

[Nora's Crimson Colored Nectar]

Does the Green Rain turn half the trees into unusable trees and you have to cut them down and replant them again?
My tree farm just finished growing and green rain happened, and now the majority turned into other tree types.

[Draconifors]

If the trees are on your farm, they should turn back the next day.

If your tree farm is not on your farm, this section from the wiki applies:
"Most Green Rain Trees that are not on the farm, whether spawned or transformed, will revert back into their original form on the next day. Some Green Rain Trees will remain."

[Nora's Crimson Colored Nectar]

yeah, just turned the next day, and they are back to normal, phew.

[red255]

whats a tree farm? if its got a tapper on it, it will not change. if its for wood, the other trees will still provide wood.

when I have a tree farm I got some tapped trees, and some wood trees, and I don't care what my trees are that provide wood.

and really I got tree farms for MOSS. Cuz.... moss is needed for some new powerful crafts.