How large should the plants be when i move them from the vegging to the flowering. this is my first time, and i have seperate rooms for each, hydro for both. im just wondering how much veg time they need before being switched to flowering ?

Kinda depends on your available lighting. It seems a lot of folks here at RIU veg theirs 2-4 weeks or until about a foot tall. I go at least a month, or a foot tall. There's plenty of related info here . . . GROWFAQ

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thanks for the info