I am in the fifth week of flowering and this problem has been going on that long. It starts in the veins and slowly progresses outward on the leaf finally turning into a rust. All of the plants are not affected, just a few. The ones affected are a Blueberry and two Afghan Kush.
Growing in soil, Fox Farms Ocean Forest. I was feeding with FF Big Bloom, FF Tiger Bloom and Beastie BLoomz but have since stopped and am only giving water. I use tap water but it is good well water. I found out that the PH of the water was getting lowered too much with the nutes. (to around 4). So now I am adjusting the water to about 6.5 without the nutes. They are under two 400W HPS lights and on a 12/12 schedule. I'm pretty sure that the low PH has done something. I don't think it's nute burn because it did not start on the tips but in the center of the leaves. If there is a nutrient lockout I don't know what it is because I can't find any pictures that look like these in any of the sick plant threads. I tried taking pictures of the plants but they don't turn out under the lights. So I took a picture of a couple of leaves. If you need I can try taking a picture after the lights go out.
Oh, I also tested the PH of the water coming out and it is two points lower than the water going in consistently on all the plants. Let me know if you need more info. I tried to think of everything.
Thank you very much for any help. It is greatly appreciated.
Growing in soil, Fox Farms Ocean Forest. I was feeding with FF Big Bloom, FF Tiger Bloom and Beastie BLoomz but have since stopped and am only giving water. I use tap water but it is good well water. I found out that the PH of the water was getting lowered too much with the nutes. (to around 4). So now I am adjusting the water to about 6.5 without the nutes. They are under two 400W HPS lights and on a 12/12 schedule. I'm pretty sure that the low PH has done something. I don't think it's nute burn because it did not start on the tips but in the center of the leaves. If there is a nutrient lockout I don't know what it is because I can't find any pictures that look like these in any of the sick plant threads. I tried taking pictures of the plants but they don't turn out under the lights. So I took a picture of a couple of leaves. If you need I can try taking a picture after the lights go out.
Oh, I also tested the PH of the water coming out and it is two points lower than the water going in consistently on all the plants. Let me know if you need more info. I tried to think of everything.
Thank you very much for any help. It is greatly appreciated.
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