Ok, this thread is a little old now and the original poster probably wont be reading this but you made it here so are probably wondering what the answer to this question is as well as he was. Talking from experience I have found that the more hardy auto flowering varieties work quite well in these conditions. The reason for this is because a lot of them can go from seed to harvest in as little as 7-8 weeks in some cases and with Scotland not having much of a summer this is ideal. They do not always give the best yields but you can still get the potency you may be after. Out of the ones already mentioned in this thread I will second the Hollands Hope and the Himalaya Gold, both nice plants. I have found that Herbies head shop has the best online selection of seeds in the UK as well as the best prices, so if you don’t think much of my selections then go there and find a few of your own, you will be spoiled for choice there.

So here is my top ten choices out of the Autoflowering varieties. 1) Green House Big Bang, 2) Lowlife AK47, 3) Barneys Flower Power, 4) Green House Super Critical, 5) Lowryder #2 (of course), 6) Samsara Shot Adrenaline, 7) Advanced Auto Kaya 47, 8) Short Stuff Automatic Assassin, 9) Flash Kush Van Stitch, 10) DNA Genetics 60 Day Wonder. ~~ I have had success with them all getting from 1 to 4 oz per plant. Most autoflowering plants do not grow all that tall so they have the added advantage of being stealthy. It is the Russian "Ruderalis" genome which makes them autoflowering but this can also make them perform poorly if you have a particularly wet summer, so pray for sunshine if you want the best yeilds. Peace y'all