Outside for sure i have done this . I got a plastic 55gallon drum and cut it in half. filled with plain poting soil. start plant inside underlight in march at 18/6 put it out first week of may.buy the end of september it was huge producing major buds which where done in oct..I topped it when it was about 3ft tall.had 2 main leaders .it was about 8 feet tall when it was done.I pulled the 2 leaders over and let the laterials go north. I got a little over 9 oz dried wasnt bad for somone doing it for the first time. After that many great things have happen you learn as you go. O i fert. with an 15-30-15 evry week and slowed down into flowering. The sun is much need for this product. just let nature do what is does best . good luck