sitting in a 1gallon pretty root bound. I feed it once a day until runoff, I usually just sprinkle some a-b veg flakes on the top of the soil and take the water from my flowering nute res. Any suggestions on what’s happening
You might consider using nutrients designed for coco.
If you were using the correct nutes I would suggest a flush with 1/4 strength nutes and start feeding daily to run off.
It looks like a calcium deficiency.