Is there way to make plants resistant to toxic fallout?

[WinnieTheJinping]

So I'm working on a mod which adds stuff which are resistant to, or completely negates toxic fallout. Animals were easy, a toxic sensitivity tag and they were done. Plants on the other hand, I have no idea how to go around doing. Has anyone tried this or know how to pull it off?

Edit : Plant's have statbases too. It just seems like it doesn't guarantee resistance to fallout.