Hey , Can you please identify this burn? I see some pictures in the plant problems guide but at least 3-4 problems looks like mine. Indoor coco soil, 400watts HPS, Canna A + B and Canna Boost Acc. recommended dosage. She is old now over 75 flowering days. Thanks a lot.
The brown crispy tips are from Phosphorus deficiency. The yellowing down the leaf blade edges is from Potassium deficiency. With harvest coming so soon I wouldn't worry to much about it this time.