Any tips on eradicating poison ivy? I have a family member who has been fighting it for years in her garden (and on her body....ouch!!). She can't use any thing that will kill surrounding plants/trees. Worried about entwined roots... I think she has tried cutting it back to the ground and pouring boiling water on it. Also, was going to cover it with thick plastic. Any hope to getting rid of it? 🫣