Hi
@raptor65! Yes it's a normal thing for a photosynthesis strain to declare its sex during the 4th-5th week of veg stage. Yes your feeding schedule is fine, I'm basically doing the same, however your feeding doses are too heavy, you gave too much Nitrogen during last weeks and as a result, your plants look dark and leaves are slightly clawling. As an emergency move, I'd try to flush them for a few days with plain pH'd water, and reconsider the next feedings with smaller amounts of nutrients. Hope this will help, keep us up-to-date and happy growing 👊