Great grow!
Cover top soil with cutten grass, wood chips, any thing organic to increasy root, maximize the potencial of your soil !!
Anyhting that make the top moist, and slow release anything or make a home for the microorganisms....
@Psilocubensis,
You would do this with Coco Coir? I try not to add anything that might bring in disease or pests from outside. I also use cloth pots to keep the soil well drained. Coco Coir should be treated as Hydroponic in the sense that you are maintaining the nutrient balance and PPM ratios, testing the excess water/feed that flows through the cloth pots, into the tray.