I looked up the sun cycle for 54 north when I can plant I get 16 hours it peeks on june 21 at 17 hours so I have 2 months of more than 16 hours light then it drops fast a half hour a week down to ten hours in the middle of october.
Everywhere in the world on March 21 and September 21 we have 12 hours of light places on the equator always get 12 hour year around and near the poles you get 24 hour light for a long time but also extreme darkness on dec 21.
I grew my plants on 20/4 with a 400 hps and cfls then with a 1000 mh at 18h then 16h for a couple of weeks before I started flowering at 14h then dropped the light by half an hour a week they had nice buds at three weeks like normal by that time they were 13h on.
I brought them down to 10.5h that would be mid october the last chance for them to finish outside in my location.
I realize the strain won't be fully mature in my location as they are still growing I did raise the light back up to 11.5 because Vale in 1970 did a study showing double the thc was produced at 12h then 10h light which is common finishing light cycles for MJ not from the equator like the middle east or most of the states.
I over vegged them so I will have to do another bud cycle maybe a third I'll still have a big plant after I pull all the big tops.
Then run them on 14h light again from 11.5h to give them a bit of a restart in the flowering cycle this time I will reduce the light 15min a week instead of a half hour because I want to keep them at 12h light to finish like the strongest sativa grown on the equator.
I would still get a nice crop of bud these are pictures of them at 10.5 what would be mid october so I'm going to run some outside this year.
I got more pics that was a week ago I got maybe a week to go they will have to go thru a second or more flower cycle.
