Can you force autos to flower switching to a 12/12 cycle? The canopy was even, but after 6 full weeks only one plant is in flower, I want the others to catch up so they can all be in the same level, I don't want more lateral grow, my tent is full.
No, if anything that's slow your auto down
Autos work on a DLI basis
Light + hrs + ppf
45-55 for works for autos some taking a lot more others not. And during veg they take more without stress give an auto too much light during pre flower they'll droopy like crazy.
Idk what's your issue. The longer an auto is in veg the better. More time to grow shoots for your auto b giving more buds.
Its typical for a new grower to want plants to turn around quick. The trick with all plants. More time and cafe during the stage they're currently on gives much better plants than trying to push them thru a Stage. Cash in on each times stage
The more veg = bigger autos
More times in pre fower for pistils
You get
If it is an autoflower then changing lighting cycle times will make no difference in when it begins flowering
they are genetically designed to flower once they are physically mature to do so regardless of light schedule