Leaves / and Thining out

If your big fan leaves are blocking bud sites from light then remove them or better yet, tuck them back out of the way if possible. Tucking causes stress on the plants but not as much as removal. The leaf borders yellowing and developing necrosis could be potassium unavailability. Usually, if your plant has been fed according to a feed chart recommendations, it's unlikely you will run into deficiencies because of the nutrients being insufficient. It more likely that your pH is off or your soil is becoming toxic with salt build up and in need of a reset. I would flush your soil with 6.2 pH water. 2x to 3x water volume example, 1 gal pot will be flushed with 2 gal or 3 gal pH adjusted tap water. Then allow to dry out till pot feels light, then feed.