I have about the same growing times as you, I'm in north eastern NY near Vermont and mold is an issue. Last year I tries nirvana super skunk which was awesome but lost my top buds to mold and they finished right about this time last year. This year I tried to get some earlier finishing Strians. I got Barney's grape ape, chronic thunder, and GDP's GDP. All were finished before Oct 6th but the grape ape and GDP both got some mold the GDP more the the grape but the chronic thunder was spotless. So chronic thunder may work for you. I'm looking at Delicious breeders strains for next year, a lot claim to finish mid September and highly resistant to mold, namely sugar black rose, northern light blue, and cheese candy though that strain claims late Sept.