They may switch back to veg if light times increase...then grow a little funny for a bit then just as normal veg is starting the flower kicks in again...so all in all it won't wreck them, but you may not get a very good yield off them.
I've found re-veg takes about 3-4 months before it can be cloned again...well nice clones...lol
I'd try to keep it inside by the window/door where it can use indoor lights until its 15+ hours a day of light outside...then they can go out without probs.
Best of luck and happy growin'