I have a serious infestation of fungus gnats in my flower room they are killing my plants what can i do about it Is gnatrol usable with plants within a week of harvest I also have some plants a few more weeks off. I want to put more of my plants into flower but must wait until i take care of this situation. I need help something hopefully quick my veg area is beyond maxed out and i need to get some more plants in there. I will buy something if need be but is there any way to get rid of these gnats with something i may have at home or can get at wally world? thanks in advance for any help