I'm new to growing, I rooted this healthy OG Herojuana clone about 4 days ago. Since then it's been starting to turn yellow at the tips of the leaves, and has further yellowed most of the leaves on the bottom. I'm growing it under one CFL bulb, while using a pc fan to ventilate. It's a small closet grow. I bought the plant from a dispensary here in San Jose about a week ago.