Check the details of the strain you are getting.
If its fastbuds some of their strains are done in 56 days. Most take around 70. Dutch-passion take 11wks on there autos. As I said if you click on it, it'll say how long it'll take, there you'll have your window, (so, that's going on their time, if it goes without a hitch)
So you want to make as little stress as possible, so you get as much as you can out of the short veg week. (This is very important) with photos, if you mess up, or have a low RH, you have time for it to catch up. So, them 1st few veg weeks need to go without a hitch, so best environment for them as you can.
And as my man said below, check the trichs but if you grow photos you already know that, as that's how you tell more so with photos than autos. Cause with autos none will take more than 60days in flowering and that's a long time, and before that you'll be able to tell even without a loop, but if you have good light you should be able to see trichs with a decent zoom.
Good luck on your autos. Have fun.