One of my plants is starting to show slight signs of having problems. The seed leaves and first two true leaves are starting to yellow, brown, and curl. I'm not sure if this is normal for the seed leaves? Pretty sure it isn't for the other two. Can someone help me out? Should I start feeding now? Is this a problem with the plant not getting enough nutrients? Sorry if this is a total noob question, I just wanted to take care of it before it turns into something drastic. My plants are around 3.5 weeks from seed. I water whenever the soil seems dry, so every 3-5 days. I mist the topsoil everyday because I've had trouble with the soil becoming too dry, but I do not mist the leaves, so I don't think it's burns from the light. Thanks in advance!