Flowering light cycle

After the plants begin to flower should I leave them on 12/12 of light until harvest? I’ve read that once the flowers begin to form, the light period is not as important. It seems to me that any light over the 12 hour period would put the plants back into the vegetative state.
Evansville, Indiana

Both statements are true, Once flowering is induced, most marijuana varieties can be forced back into vegetative state by placing them under a long day regimen. However, this occurs only after a long period of up to a month under the new regimen.

Although an occasional lapse of the light regimen or imprecise on-off times will not stop the plant from flowering, it can affect the quality of the flowers. They may be smaller, looser or lanky depending on how severely the regimen has been violated.

Readers with grow questions (or answers) should send them to Ed at: Ask Ed, PMB 147, 530 Divisadero St, San Francisco, CA 94117, USA.
You can also email Ed at [email protected] and send queries via his website at www.ask-ed.net.
All featured questions will be rewarded with a copy of Ed’s book, The Big Book of Buds.
Sorry, Ed cannot send personal replies to your questions.