Root cellar bug bomb

Does anyone know if this is a terrible idea?
I'm not sure how to get the spiders and what not out of my cellar.. it's a dark sealed room 4-5ft under the ground that has been closed up for the better part of our life at our current home..

I'm turning it into a grow room for medical card holders as a hobby thing, and can't figure out how to deal with the spiders. We aparantly have blackwidow's, though were not really supposed to here, as well as wolf and brown recluse.. and I've seen.. at least one of each down there.
I like spiders, and I generally like letting them live happily on their own, but.. I do not like necrosis.. and I'm fearful for myself as well as potentially my clients well being, so I think I'm going to have to fumigate the place..

I'm worried that this will affect the plants though, so I thought I would ask here first. My plan is to buy one of those "bug bombs" that you put in your house and leave for a few hours.. and supposedly everything is safe as ever when you return and set it off.

I have not moved any of the grow stuff into the location.. so right now its just a sketchy wood walled dungeon:wtf:, which is probably a good thing, as nothing will be in contact with the poison once it's all in place.

long post small question, will fumigating the dungeon then moving all the grow stuff in after a day or two, including covering the walls with mylar.. end up hurting the plants or the bud? I can even set up some big fan's to air out the place..


Thanks!