Premature flowering!

I have some photoperiod plants which I started indoors and are now in a small greenhouse. I moved them outside when we had 13 1/2 hours of sun, near the end of March. Well, that must have been a mistake, for they are blooming already.
What do I do now? Can’t move them back inside, no room.
So will they reveg? Does that mean the flowers will disappear? Have I ruined them? Will I still get a decent crop, quantity or quality? Help!!AqwUoR4ipzcQgdQD8LlRycRryjFC7A!AqwUoR4ipzcQgdQEIYZTLa5iMGd7-Q