12/12 starting on day 56. Switched to the Boost formula 15-30-15 for bud set. Lowered the EC to provide less Nitrogen. Not sure if my slightly clawed leaf tips is Nitrogen toxicity.
Good luck with the grow. I'm on week 10 of my first grow with two sensi-seeds northern lights feminized, and the plants are doing really well.
I hope yours do the business also.