If you want bigger plants then go on to your seed bank and look at strains that say early girl! They are typically done and ready for harvest by mid September to mid October! Or you could just run any auto flowers that is any type of high you prefer! They are perfect for up north out door grows!! Good luck 🍀👍
Hi mate!
I think it depends on how far up north you live and how much you have light during the day and what is the temperature in there. Basically you could do autoflowers so you don't need to worry about the length of the day and it will start to flower as soon as possible and they are ready in ~12weeks from seed. You can also do FAST strains and those are faster flowerers but they need that minimum of 12hrs of uninterrupted darkness to flower.
Hope this helps and happy growing!!