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Thanks all. I do appreciate your replies/thoughts. If anyone else has any other thoughts (beyond PH issue), please do share.

My PH is pretty steady. I use an automatic fertigation system that waters 5.75 PH (Coco Coir) every morning for 90 seconds (about 20% run-off). It is a 20 Gallon system that I only have to refill once a week. I am very curious, because it is only affecting 2 of 5 plants and they are all on...

Hi All, I'm a new grower working toward my first harvest of 5 plants. Two are looking ill in the flowering stage. (Other three look fine on same feeding schedule.) I need a little help from experienced growers on: A diagnosis How to treat at this stage in the game (if potassium deficiency.)...