The plant is indoors under 250w HPS lamp. The leaves are still green, however I thought I had read a long time ago that it is unhealthy if any leaves are touching the soil. Possibly could lead to a fungus contamination?you tell me. Are they still green? If they're still green then your plants are still using them to make energy. Cutting them off will result in a slight stunt of growth, and maybe even two new growing tips, making your plant bushier. You indoors or out?