Little help. Attached pic shows a little brown spotting and below a leaf that started spotted and has since dried. The plant is 18 days old but started spotting a week or so ago. In other words pretty early for any nutritional or watering or ph aberration I would think. Otherwise the plant looks great. There are 3 other plants sharing the same experience and there is nothing awry. In fact this one is the most aggressive grower, the largest plant. Look familiar?