I don't agree.. sorry Corso. It all depends on the strain. Now adays they have express autos which fully flower in 65-70 days. Say you order the seeds tomorrow and they took a week to arrive and you soaked them, popped em, it would be say 70 days from then. So say they popped 20th of july it would be ready give or take a couple days off september 20th. North america doesn't normally get frost until late october early november unless its an off year. SO you should be just fine. I've done it with autos before.. july 1st and have had plenty of time, I once recieved a diesel clone from a friend randomly the first week of july (photoperiod not auto) I still grew it and harvested in time. The quantity wasn't there in comparasion but damn that was some sticky icky. So In guess what im trying to say is, if your doing it in your back yard and you want to be super safe take corsos advice and grow em out and in the fall bring them in. But if you plan on using a guerilla method where lugging your plant home isn't safe or practicle then just do it anyways, I can guarentee you will be fine infact I just ordered a bunch of auto's which will be going out in the great outdoors and I have no worries. Keep in mind that I am assuming you do not live in the north.. figure out your past frost dates and plant accordingly. This year has been very hot for canada so I'm sure you will be okay. When the temps lower if anything they will bring out any hues of purple that may be hidden in the genetics. Just make sure you choose an express auto and sooner rather than later. For the past few years I,ve waited for a week before halloween to harvest and that is way longer than what you need.. But I'm in Ontario it could be different where you are