My Harlequin CBD is on its final weeks of bloom. The sugar leaves on the flowers however are drying up and yellowing, there is still about a week to harvest.
The pistils are turning white → orange → brownish and the flowers are about the size of nice carrots. The fan leaves are already gone and trimmed out.
Humidity is about 30%, to avoid rot no humidifier is used. Lights used are smallish china box led with spot leds supporting, 2500 lumen at distance aprox 40cm.
Air sirculation is with small fan and biggish air TD-350 Silent conditioner on 100x100 tent.
Nutrients are Advanced Nutrients in adviced measure.
Is yellowing of the bud leaves caused by:
Too much light?
Too low humidity?
Too much air circulation?
Thanks in advance!