These plants are about 1 month old. They have been sitting outside all this time and i finally decided to bring them inside to grow under CFL's. This is my first grow so please be nice. I was looking at everyone else's plants and they all have a nice dark green color. Why are mine so yellow-green? Im feeding it miracle grow tomato plant food and its on a 18/6 light cycle. I water when the soil gets dry. Please help!