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Liquid Plant Food is the name of the Foxfarm nute. It has worm castings and bat poo but not a lot of npk just 0-0.5-0.7Nice looking plant and it does seem to be healthy even though some of the lower leaves have started to turn yellow.
I do not grow with a hydroponic method nor in coco coir or in Coco Loco but have read up on it several times. In the past I have used the Fox Farm line of fertilizer mixes and still follow the info from the company and have called them on questions about their products.
The quoted part from you first msg is an important clue as to what might be going on.
Need a bit more info. I understand why many Fox Farm growers will switch over from Grow Big to Tiger Bloom and why some of them recommend doing it. That switch can be contributing to the yellow leaves showing up at this time.
You mention "30ml/gal of liquid plant food" and I take it that this is part of the current feeding schedule along with the Cal-Mag and Tiger Bloom. What is the name of this liquid plant food? What are the N-P-K numbers?
The grow big has 6-4-4 which I assume gives for N for the first part of the grow.
Then switched to the Tiger Bloom for flower which has 2-8-4
I’ve been using the general feeding amounts on the back of the bottles and that’s where I got the numbers previously posted.
There were a few days where the yellowing stopped and the yellow leafs died off. They started on new leafs and continue to take over more leafs. So problem is still not solved.
Pic of nutes
Pic of yesterday vs 7 days ago