Yellowing leaves, is this normal?

I’m halfway through week 6 of flower, leaves started yellowing on Saturday, it was due for feeding so I assumed that this was the issue. Well 48 hours later and it’s getting progressively worse. So looking for any advice. Setup info below.


Unknown strain

5 gal fabric pot

Ffof soil + perlite

GH flora trio nutes

GH cal-mag

Water ph 6.2, 3-5 days as needed

177w actual draw led light

How often did you feed the GH trio between giving the plant water only?
When you feed what quantities of each bottle do you feed them in ml?
What are the total PPM's being given when you feed the GH?

I alternate the nutes and plain water.
6ml micro 10ml bloom 5ml cal mag
Idk the ppm, as I don’t have the equipment to test that

If that is per gallon that sounds like a lot. If you started using that much bloom formula at the very beginning of flowering it may be the problem. Bloom fertilizers are supposed to be introduced slowly at the beginning of flowering until the 3rd or 4th week.
General Hydroponics trio are used for growing hydroponics, they are not meant for ffof soil. Using them probably caused the problem. Problem is whether you should change what you are doing or continue on now that you have been using them. Someone else may be able to answer that.

Clawed leaf tips are usually a sign of being over fed so I think you may have a nutrient antagonism issue. Gets harder to read them in later flower as little issues can cause lots of leaves to get shut down quickly to keep buds healthy. I'd go calcium and water only till the end. She has plenty of green left to finish fine.

I’ve only upped the bloom the last 3 weeks, plant is almost 19 weeks old and no problems whatsoever with nutes til a couple days ago. It was only 3 days between being fed, overwatering sounds plausible. I also forgot to mention that I increased the light power a week ago for the last half of bloom. So I’m thinking maybe that could be a part of it too. Yellowing is only on the very top buds, otherwise looks normal.

deviousdragon63 said:

I’ve only upped the bloom the last 3 weeks, plant is almost 19 weeks old and no problems whatsoever with nutes til a couple days ago. It was only 3 days between being fed, overwatering sounds plausible. I also forgot to mention that I increased the light power a week ago for the last half of bloom. So I’m thinking maybe that could be a part of it too. Yellowing is only on the very top buds, otherwise looks normal.

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Top yellowing tells you that an immobile nutrient needed for photosynthesis is locked out or deficient. But could not be deficient if you are feeding, so more likely looked out from ph or nutrient antagonism. That's how I'd think about it.

So plain water to finish it is then. After she dries out for a few days of course. Thank you guys for your input.