clones from indoor plant

I live in Manitoba canada and i plan on growing some plants indoors until summer. The thing is i dont think the longest daylight time in manitoba even reaches 18 hours (i could be wrong) but anyways would the clones immediately start flowering if i put them outside in early summer and then try to reveg when they realize the days are getting longer causing a big waste of time?

no they shouldnt flower right away. even 16 hrs is good. they should start flowering in sept when the light hours get even lower like 14 or so.