Yeah maybe a bit more,
Its all about checking them weekly but in my experience of outside grows in the northen hemisphere, its at least 8 weeks flowering, my psychosis took 10, right into november. The weather here in the UK is freaking out,
winters are wetter, summers are wetter and colder, crap basically, hope it changes this year, even my daffs have stopped growing cos its suddenly colder, Spring is 1st march here, well used to be, now its more like 1st April, Fools day! lol
All down to strain aswell. etc..
So your prolly right, just keep ya eye on them trichomes!