Hello all, I have some three week old plants that started showing signs of browning bottom leaves, I had them in 4 inch pots planted in some custom soil mix that is made locally by a company here in Michigan. Other than the bottom leaves starting to brown they look healthy. I was told by a reputable grower that the browning of the leaves was caused by the plants being root bound. I have since transplanted them into 3 gallon pots. They did seem to have a lot of roots. I have seedlings that are a little over a week old in this same mix that are doing great. What do you guy's think.