time released nutes been my biggest killer in the first years, cause a lot fertilizer burns to me. that is followed by over-watering and lack of proper drainage of the pots/soil i used in the pre-grow. improper lightning of the grow/plants stretching due to this. small wildlife such as mainly squirrels and deer in my grow. and to cases of moose and a black bear pushing their way into my grow. that bear paid for it dearly