Finsfan answered grow question 7 days ago
I think it's mostly because of the strain, possibly more sativa genetics? I had a sativa hybrid go to week 16 before. It was pretty nuts and aggravating lol.
However, I also noticed you burned them a lil bit with the tips yellowing and curling. The curling I believe is usually a nitrogen problem.
So stressing them out adds some time as well. I know this because I stressed my plants in flower rn which went to flower the same time as my others, but were way smaller due to nute burn. You're doing fine tho man, don't stress it. I think they look good, just need a lot more time. You're patience will reward you in the end I'm sure.