Deficiency? P or K? Calcium?

[Cwmoore577]

Nearing harvest on this one, it’s a Zkittlez auto in week 15 (day 108). Medium is Royal Gold Tupur mix which is coco based. Tent runs around 75°F and low RH at around 35-45%.



I water usually water 2x a day and occasionally 3x a day following the General Hydroponics feed chart recommended ratios but at 1/4th the dose in RO water which is:
Emerald Harvest Calmag (2-0-0) at 5-6ml/gal.
FloraMicro (5-0-1) at 1ml/gal.
FloraBloom (0-5-4) at 4ml/gal.
Liquid KoolBloom (0-10-10) at 1ml/gal.

Going in my water reads an EC of 800-850, 550ppm and always pH’ed to 5.9-6.0.
My last runoff measurement was EC of 880, 600ppm and a pH of 5.80.

Started getting this on the leaves recently..

Should I increase the florabloom or the liquid KoolBloom or just keep feeding it like I already am? It should be ready to harvest in a week or two. Trichomes are still mostly clear, some cloudy and a couple amber.
I’ve also had a calcium issue with this plant as well as heat/light stress from the HPS 150 light I put in the tent right before flowering began.

 

[Old Salt]

I think you still have a cal/mag issue. Try raising the pH to 6.2. This increases the bio availability of calcium.

 

[Cwmoore577]

I think you still have a cal/mag issue. Try raising the pH to 6.2. This increases the bio availability of calcium.

ok Will do. I increased to 6.05-6.1 in the last few days I’ll go to 6.2. Also noticed my runoff ph is steadily dropping. Was at 6.0 about 5-6 days ago and now is at 5.71.

 

[hazeclouds92]

I have this exact issue on the exact same strain is this zkittlez auto by Barneys farm? Mine started to do this coming towards the end of flower too. Heres my thread

Little advice needed please brown spots!

Strain - Barneys farm zkittlez og autos # of Plants - 5 Grow Type - Soil Grow Stage - flower Bucket Size - 12L Lights - (1) 600 Watt HPS Nutrients - bio bizz grow and bloom Medium - bio bizz all mix PPM - unknown PH - 6.2-6.5 RH - 50% to 55% Room Temperature - 22°c-25°c Solution Temperature -...

www.420magazine.com

Would love to see how yours finish off!