12/12 what well happen

i'm growing 6 bluberry's and there 2 weeks old right now. started from seed. i was just wondering wut would happen if i put them on 12/12 light right now. would they flower or do i have to wait for preflowers?? let me know thanks

you can switch to 12/12 whenever you like. if you did, the plants would begin to flower and in about 3 weeks they should have shown thier sex. Your plants are small, so flowering now will mean you get a low yield. If you let the plants grow to be larger and extend the veg time, you will get bigger plants and bigger yield. but you can go 12/12 at any time. even right from the beginning.

can i clone 4 weeks in to flower... from seed?

if i grew them from seed and started them at 12/12 right when they popped. would they still only take 2 months to finish flowering??. and is that how long it'll take if i flowered now. also well the size of my plants determine the quality of the bud??