labifleanswered grow question 6y ago Hey gardener, how's it going? Your plants are amazing! I always saw fast grows when my old roommate was growing, growths from 2 weeks to 1 month. However, he did 2 sessions with like 1 and a half months and one with 2 months of growth, and he got a crazy result; we smoked like crazy. When you're growing big plants, you have to watch out for stretch because if you have a sativa hybrid, you end up with plants touching your lamp and burning, so you need to manage that before switching to 12 hours of darkness. With a 400 HPS, it balances well; for once, I'm not seeing LEDs, and it feels good. Take care and happy growing!