Thanks natas i will remouve the brown blade only as suggested in ur previous answer Sent from my BLA-L29 using Grasscity Forum mobile app
I don't think you have to remove the whole blade( the older pic made it look like it was the whole blade, not just the tip). Just cut that curl/discolored part off (the tip) perpendicularly. And see if it continues.
like natas said i would just cut that off and keep and eye on the plant, from what i can see thats your only brown leaf. If it continues i would look into possibly bugs or maybe some sort of fungus, if your not already i would get yourself some Montery BT and some Green Cure fungicide your gonna want to start giving your plants this to protect them from cattapillars and powdery mildew, just a precaution something ive always done especially during the flowering stage