I planted a new mint plant in a pot about a month ago and it had big, healthy green leaves. Now it has some serious issues but I'm not sure what I'm doing wrong. I was watering it every 2-3 days and it was getting a full 8-10 hours of sunlight and the leaves slowly started to dull and shrink. I thought I was overwatering it and backed off and saw no change. It was just planted in the pot so I don't think it's root bound. What can I do?