By continuing to use the website or clicking Accept you consent to our cookies and personal data policy and confirm that you are at least 18 year old. For details please see Privacy Policy and Terms
This is a calcium, NOT a potassium deficiency... and, while it is common, it is NOT normal and IS a problem! In flower, plants need more calcium so introduce some Calmag to your nutes but only once a week... you won't see any improvement in the leaves that are already affected but the problem should not spread....
Good luck!
It's a P deficiency but DON'T WORRY! It's perfect and normal at this stage of flowering, keep flushing for one week and the you can harvest :) if you want you can cut off the died leaves, to avoid mold, but it's not necessary