Are plants creatures or objects?

This has occurred to me due to conflict between Fabricate and Blight, Fabricate says it can not target creatures and lists trees as example targets, Blight on the other hand can only target creatures and lists mundane normal plants as example targets.
So, which of these conflicting spell descriptions is correct?

Note:
It also occurred to me that plants might also be whichever one is convenient, unlikely but possible.