It sounds like you’re mixing salt based nutes and organic nutrients and soil. I usually have better results when I go with one or the other. Organics rely on the micro organisms in your soil that break down the minerals and nutrients to feed the plant. Salt based nutrients give them the food directly. I use organic dry amendments and will use salt based nutes to correct a serious deficiency if I see one but it is hard on the living microbes in the soil. Too much can really cut the numbers down. The GH trio is a balanced feed and you can just use the grow recommendations on the bottle and then switch to the other formula they list as bloom or flower a couple weeks after flip when the stretch is over.
I’d try feeding the recommended rate for vegetative growth and see how they respond. The yellow leaves won’t get their color back but you should see the progression stop and new growth should be green and healthy.
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