Growing sativa in Michigan

I'm a little worried about the 12/12 budding start time.Here it doesn't get to 12/12 till september. That doesn't leave much time for budding.My two fems are over 4 ft. tall and have pre-flowers on them.Will switching to a flowering fertilizer make them flower any sooner? I'd appreciate any input.Thanks

if its outdoors your best bet is to bring them inside..

also I think you might have posted in the wrong section...this is more for tech. support and questions
try the outdoor section in the grow room if you have an outdoor plant or post anywhere you feel fits the category in the grow room..goodluck!