Flower about a month under lights, then move outdoors?

I have trouble getting photos to finish with my local fall weather. Thinking next summer to have a couple of plants flipped and enough flowering time under lights then move outside sometime past mid July. I am about 47 deg. N . Dont know how close I would have to snch. the daylight hours so they dont revert to veg.

Is it a crazy idea or is it something that is done.
 
I have trouble getting photos to finish with my local fall weather. Thinking next summer to have a couple of plants flipped and enough flowering time under lights then move outside sometime past mid July. I am about 47 deg. N . Dont know how close I would have to snch. the daylight hours so they dont revert to veg.

Is it a crazy idea or is it something that is done.
Auto flower strains for outdoor.
 
Light deprivation is probably your best bet for photos Could start pulling a tarp (or setup an automated retractable covering) in July, every day for a month or so, until mid August. By then the hours will match the same deprivation schedule, so you can quit tarping them off the rest of flower. They'll be halfway done already, and starting to stack before they would naturally start flowering without light depping. Finish a month early, when the sun is still high ;)
 
If I already had them flowering for a month inside, it would be a matter of preventing them re- vegging. Would they need the same degree of light deprivation to hold them? I expect that different cultivars may have different precise day length figures to trigger them. Tales of "light poisoning" spooked me
 
I veg under lights; then move outside to flower. (I use the gas lantern technique to veg them for a few weeks longer once moved outside.) But you're already flowering under lights? I guess, I don't understand why you would want to move them out now?
 
I think the trouble is the strain not finishing fast enough. I think your idea would work though. But you could run into reveg problems and you also lose the whole start of the summer when those plants really dig those roots down deep. That really pays off later in the season. I have done some selections where I pull every thing that hasn't started flowering by the mid to end of July, because they will never be able to finish anyways. So I think what you are thinking will work, but it would be best to get some genetics that will start flowering early enough so they can finish early enough.
 
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