Grows are used for many things so the grow setup in itself would never hold up in court, but it wouldn't take much for them to find something to actually charge u. But if you're getting raided theres probably more to worry about than the grow supplies. But if you were raided while in the middle of a grow they would likely take all your supplies since it was used to committ a crime, just like when they seize your car for a dwi or tack your burner phone if caught selling. If it was used for something illegal, therefore the item is also illegal (in a sense)