There are a ton of good strains that will start flowering in july in your neck of the woods and finish by late september (well before killing frosts in your area i would assume) Gurrilla Gold, Mighty Mite, Early Wonder, etc PM if you want some seeds for next season that will finish good and early. I am at 45 deg north and in eastern ontario and usually start harvesting around sept 1. Here are a couple pics from last week