I'm at 60 degrees latitude and while I've never finished photos this far north I had good success last summer with Dinafem Auto Amnesias. I know you said no to autos but they've come a long way and if you veg them inside you can finish a couple crops per summer outside. I averaged 2 dank z's per plant and they were better than any purchased weed I've seen here yet.
I've also finished a number of outdoor crops- C-99, NL x C-99, Afghooey, Blue Moon Rocks, JTR and others at 45 degrees N. A lightly-heated greenhouse was required to finish them. Most could've gone longer but all produced good bud, and up to an LB per plant.
Is light deprivation an option for you? A guy called Backcountry has posted about the nuances of that elsewhere, just google "Backcountry Forcing Bloom". Good luck!