Save my harvest 🙏🏼

[Manda]

Hi guys,
Need some help, please. First time grower and I’m not sure what to do from here. I planted 3 auto seeds and they are about 70 days old. Everything seemed to be going good until about 2 weeks ago. I noticed the leaves were starting to turn yellow and have continued to get worse. 2 plants are in 5 gallon cloth pots and one is in 5 gallon plastic pot. EaCh pot has 3lbs of ‘Kind hot soil’ as the base And then filled with ‘Fox Farm Ocean Forest soil’. According to the soil meter, pH is reading 7.5. I have 2 LED lights hooked up. One is a king pluS 1200watt full spectrum & the other one is Spider Farm SF 2000Watt LED. Each light is about 12-16in away from the plants. The grow room temperature is between 76-81 with auto exhaust fan. Humidity is at 35-42%. I also have a co2 bag hanging in there. And usually they get watered every 3-4 days. No fertilizer additives have been used as Directed by ‘kind Hot Soil’. If you could help guide me in the right direction with the next steps, I’d greatly appreciate it. Attached below are the 3 plants.
Thank you in advance.

 

[burnin1]

I don't grow Autos but I think they are ready in about 10 weeks. The yellow leaves may be a normal occurrence with some strains at harvest time.
Seed to harvest in about 70 days is about 10 weeks. Normal for an auto.
They look good and may be ready to cut.

 

[Kyfarmerb]

Yeah what he said...haha just kidding but I do agree, it's about time for them to be yellowing cause they have used everything they could from the medium you got them in.or since you say the pH is a seven five then your girls may be going thru lockout of some sort.either way it's time to flush em and pull em in next couple of weeks.happy growing bro.