Shagrathanswered grow question 5 years ago 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!!