Yellowing leaves

[Rambo]

First time grower. Out of 10 plants, 3 have this on lower leaves. Growing inside. pH is at 7. Help please!

[Burny]

It looks like nutrient lockout maybe due to the ph not being correct in the root zone. 7 is just a little bit too high for ph.

[DrPhoton]

It looks like calcium deficiency ? Need NebulaHaze to confirm as this is quickly degrading.

[Flockshot]

I will start with an assumption that you are using cannabis friendly nutrients, and you are not over/under feeding this plant.

Secondly, I will tell you I am no expert.

If you are in soil, I would get the PH down to 6.5 and transplant to a bigger pot. I think your issue is a root problem, and being root bound is a likely culprit. (unless that pot is a lot bigger than it looks in the picture).

Just my 2c.

[Rambo]

Planted in potting soil and have been using Open Sesame once a week for the last 3 weeks. I will transplant into bigger pots and see what happens. Thanks!

[fozzy]

Just as Flockshot said bigger pot and 6.5 ph. Good luck!

[Rambo]

Thanks! What is the best way to lower the pH?

[NebulaHaze]

You could give the plants water at 6 pH every time, and it will slowly start coming out lower as the pH get corrected at the roots

[Rambo]

Ok, I'm at a loss now. Re-planted into larger pots and have added plant food with 12% nitrogen and still getting yellowing on lower and middle leaves. Also some lower drooping leaves. pH is below 7. Help please!
Tried several time to upload pics but keep getting "error uploading" message.

[NebulaHaze]

I agree with the others. Bigger pot with fresh soil for sure, especially before it starts flowering. I would also bring the pH down closer to 6.5, as 7 is a bit high especially if you're seeing nutrient problems.

Also, those spots. Do they each have a little speck in the middle? I ask because they just look sort of very evenly round, which reminds me a tiny bit of a fungus called leaf septoria that makes round spots on leaves.

[DrPhoton]

Rambo. Could you answer these for me, i will try to assist you.
I have had similar symptoms like this before, i was growing outdoors in a 12+ gallon pot. I couldn't figure it out. I decided to repot into a garden bed and found the plant was root bound, i was shocked as i was not expecting it to outgrow such a large pot. I think it was the particular strain as the other plant i had, was no where near pot bound.
What was your plant like when you repotted, was it root bound ?

To me it still looks like calcium deficiency. Incorrect ph balance can cause this, however if you have corrected this and still have problems then the cause may be elsewhere. What enviroment is it in, indoor, outdoor ?. Whats the temperature and humidity. Low or high. High humidity can cause calcium deficiency as nutrient uptake is passive and requires transpiration to move nutrients.

One thing that does look concerning is the spots nebula mentioned. I seen this too, does look like leaf septoria. Have you had more of these turn up ?

[Rambo]

They were not root bound when I transplanted into a bigger pot. I am growing indoors and the temp runs 76-86 with humidity running 70-75%. out of 10 plants, only 4 have the yellowing leaves.

[DrPhoton]

I see, so as i said, high humidity can cause calcium deficiency to turn up first as it gets locked up in the soil very easily. This could be your issue, 70-80 percent humidity is quite high, its ok for the first few weeks of plant life, but as the plant gets older and requires more nutrients it becomes a limiting factor. I would recommend a dehumidifier (or sufficient exhaust if your not already running one) which you will need for flowering anyway if those humidity levels stay unchanged, that will for sure be way too high for flower and you risk underdevelopement and fungal disease.
Perhaps also give a cal mag supplement a try.

[DrPhoton]

Just to add, temperatures above 82°F causes additional stress on plants. This is exacerbated when humidity is high, as the plant cannot sufficiently cool itself through transpiration.
Also as nebula suggested, check for specs in the center of those spots. Google leaf septoria to see what we mean. Im thinking this is just calcium deficiency as well though, as i see a hint of it with the lower leaves also.

Best of luck.

[Rambo]

Thank you!