Athosanswered grow question 6 years ago Organic growers use apple vinegar to lower pH, nothing wrong with it. I checked your weekly updates. You've been over watering a lot and feeding too much too early. Flush the media and do not feed anything, let the soil feed the plant, only resume feeding when the plant shows the first signs of deficiency. By the way, dark green leaves are nothing to be amazed at, it's a sign of over feeding, too much nitrogen to be exact.