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Manually feeding once a day with a 100 ml syringe.
Seedlings were healthy and grew vigorously from the outset.
Once I transplanted the coco pellets into the solo cups I started feeding starting at an EC of .4 and worked up to 1.0 keeping the PH between 6.1 and 6.3.
I'm not sure if this is nutrient burn or a cal/mag issue (deficiency or lockout), or something else. Anybody know what is likely to be causing this, and how to treat it?
I don't think it's a cal mag problem. It could be due to using up the potassium. I would be tempted to leave your nutes as is but increase the bloom slightly and see how that goes.