Doc and fellow brixers,
I've got some yellowing occurring on a couple of plants and need some advice. This is a Big Bang Auto, day 70 from breaking ground. Environment is near perfect, running under my new Spyder LED. First time running autos, so guessing on time of drenches, amount of nutes, etc. I've been feeding them quite heavy, though I've backed off the last couple of weeks as leaf tips are getting a little crispy.
The upper fans are quite pale compared to the lower fans (see pic 2). The 5 gal pots are HEAVILY root bound. There is virtually no loose soil on top and I cannot penetrate the surface with my finger due to the mass of roots. Well not easily... These plants require a full watering every other day.
I'm thinking this is the mid-bloom fade. Would a super drench be appropriate? Or are they to far into bloom? I'm guessing they're about two weeks to harvest. Thanks.