yes, in my short experence with autos they don,t know when to stop outdoors. The ones I grew indoors last winter were 8 or 9 weeks from seed to harvest. Outside they never let their sun leaves turn yellow like they did for me inside. The leaves turned yellow then the whole plant died!Outside I took the main buds then pollenated the remaining. I then waited 6 weeks for the last harvest. So, thats 3 months plus 6 weeks equals 4 1/2 months.Although I harvested most at 2 months and they were ready to smoke. But there were no yellow leaves so I think who knows if they would have died on their own.There was always new growth at the ends of the buds.