Greg Seitter
Member





The yellowing is now at the top of the plant and seems it is starting from the edges of the leaves and working it's way in filling the whole leaf. Once they are fully yellow they begin dying at the tips and curling up.
I've read about root rot, N deficiency, calmag deficiency, PH lockout, underfeeding, and other causes that I can't seem to pinpoint on my issue. Although the most likely culprit is N deficiency because I halted veg nutes right when I flipped to flower which I read can result in the stretch of flowering taking all N from leaves.
There are also curled leaves that are on most inner buds and some buds smell kind of sour. Not sure if this is normal or bud rot?
-Strain: purple kush
-Temps: night=70 and day=84ish
-Humidity: 35-53% (day-night) used to be 75% at night
-Two oscillating fans
-One exhaust ventilation fan
-One 400W HPS roughly 12 inches above canopy
-Water every 2-3 days (off/on/off/on feeding) have never used calmag
-Week 3 1/2 of flowering
-water PH 6.3-6.7
-smart pot (fabric)
-2x4x5 grow tent