Overwintered begonias

My overwintered begonias have all sprouted. Some sprouts are quite big but not too big.
I've potted them up in temporary pots and they'll stay inside for now.
Should I water them or keep them dry? They're damp at the moment but not wet.
I'm a total begonia novice but I've kept the ones I liked.

 

Just keep them moist and not too warm in the hope of slowing them down a bit would be my advice, in London you might be OK outside in a month.

 

Than you @pete
Why do I need to slow them down? They're in a South facing porch and it can get pretty warm.

 

Well I was just thinking you wanted them for outside summer display and not having the space to keep them before hardening off.

 

OK. See I'm pretty dumb about begonias
I'll bear that in mind. Plenty of room at the moment.
@pete

 

They typically are fragile and easily damaged in transplanting. If you can house them in the final pot/container that you will keep them in, it will just be a case of maintaining them until its safe to put them outside - late May ?

 

They're already potted @infradig . Probably best to leave them now.