yellow leafs on one plant

If she’s only a few weeks from harvest- I wouldn’t worry about it at all. She’s got 2-3 weeks of continuing to flower and really fatten up while yellowing off to the perfect shade for harvest. By the time you chop, you want the majority of foliage to be yellowed off or even a variety of fall shades (yellow, orange, red, purple and sometimes even blue). If the leaves begin to really die off instead of just change colour- I remove them as needed. You worry when your foliage starts to yellow off too early in the grow or only in one place on the plant all of a sudden. But yellowing of the largest, oldest fan leaves first and eventually the entire plant close to harvest is usually all good for me. All the best with your upcoming harvest- looks like a good one to me. Great job 👍