I have three plants, two have pre flowered female but third one hasn't pre flowered. One of them has grown huge both horizontally and vertically and I think it's time to put them all into flowering so I don't face any height issues during flowering. Firstly, is there anything I can do to extend my veg cycle to let other plants grow a bit but slow the growth for the one growing tall? How should I switch into flowering. I'm under an MH bulb right now... should I put them into 12 hrs of darkness first and then switch out the bulb for an HPS... OR put the HPS in and then start 12/12?Also, should I flush before putting into flowering? I've heard pre flower flush is actually stressful on the plant? What do you guys recommend? I'm thinking of starting tmrw since I watered today with big bloom and grow big... would I need to add flowering nutes next watering or the watering after that?