- Can some of you guys who seem to really know your outdoor/greenhouse growing techniques help me figure out exactly how you plants dont flower when you start them so early indoors? like when do you plant the seeds? At what light cycle? How many days till you sex? What light cycle do you use to revert them back to veg? When do you take outside or in greenhouse under natural light? Ive got some seeds I want to start but Im afraid that by the time they fill a 5 gallon bucket in like a month, Itll be maybe mid march and I feel like the daylight hours would be too short and they will start flowering. I read that you shouldnt let your plants get rootbound when you put them outside or they WILL flower. I do plan on using a greenhouse so frost is not an issue for me. Thanks