Could be a potassium deficiency, could be a lockout somewhere.
My apologies if it's posted earlier in the thread but can you give me the rundown of what your doing?
1. What's your soil?/nutes/water situation
2. How often and how much do you water?
3. What's your room temp?
4. What size pots?
Thanks for the replies @RastaRoy and 714steadyeddie
Soil: Foxfarm Ocean forest
7gal fabric pots
4plants all blue dream
Nutes: Earth Juice Line liquid including,
Grow, catalyst,microblast,Oilycan(calmag), and bloom
I aerate water for @ least 24 hrs,
Tap water( mountains) ph of around 7.4
Then add nutes,
EARTH JUICE then brings ph to around 4.0
Bubble another 24 hrs,
Check/ adjust ph using Earth Juice ph up or down until 6.4-7.
Water about 1 1/4gal per plant, small amount of runoff
PH runoff is around 6.3
Water every 3 or 4 days when plants barely start to droop and soils dry
Been foliar feeding after lights out with earth juice cal/mag and microblast
Did an entire flush with phd water about 7-10 days ago before letting dry completely and adding nutes.
All NUTES ARE AROUND 1/2 to 3/4 STRENGTH OF RECOMMENDED DOSE
I have a 4" intake fan at grount level and a 6" oscillating fan 10" above canopy
Temp: 70-81* F
Humidity: 30-45% roughly
Air cooled 400w hps
And
200w GGLED (4-cobs@50w ea)
4x4 tent
Thanks for looking u guys are awesome!