5 weeks vegging + 8 to 9 weeks flowering means 13 to 14 weeks total cycle time.
Key is in your flowering stage. Seemd like your flowers just finished transitioning stage. Andyou should have about three or four precious months to fatten up the flowers. This would be the time to go full throttle with your fertilizing plan.
After this coming month, it will be harvest preparation time. Then not mouch can be done to improve yield and quality.
Good luck.