Tropicanna Banana by Barney's Farm

If it's only happening to top canopy leaves, I think it's light burn. Raise your lamp or lower the number of hours per day of light. You need to get your Daily Light Integral down.

Grow Mates: I’m looking at the ends and seeing that they are not truly burnt. Burnt is brown. This is tan…and not on all the leaves also. Nutrient burn will torch your leaves brown with a quickness from new to old pending how bad. I agree with a flush and check your dayum pH man 🤣🤣🤣

Hi there. Your probably over feeding her with nutes, plus your diary says your running in coco but your ph is 7. Now when growing soiless like coco or dwc the recommended ph is between 5.5 and 6.5 with the sweet spot being between 5.8and 6.2. Try running a mild nute solution with ph 6 through so you get plenty of runoff.