I'm near Boston, I started some plants inside and put them outside second week of June, the plants hardly seemed to grow at all, then 2nd week of July is when they appeared to take off and now are growing good, except for 3 autos that turned yellow and shriveled within days of putting them outside. Next year i'll leave them inside longer and wait until 1st week of July to put them outside. I'm right on the coast and it was cold and rainy it seemed.
My first time outdoors here too, I'm used to growing in Norcal and Oregon outdoors but I'm guessing the first week of August we should see some changes.
It depends on if you are u.p. or not. Also is strain dependent. On average tho you should already be seeing pre flowers at least and should be in full swing by mid aug. An early flowering strain will be done last week of Sept but most are done second week of Oct.
Hey thanks for all the replies, pretty much what I thought as well right around mid August for most strains. I'm at the northern tip of the Lower Pennisula myself.