Aeroponic systems don’t require soil. Instead, nutrient-fed water nurtures plants that grow in a soilless growing medium.The root systems are exposed to extra oxygen, and the closed-loop irrigation technique requires 95% less water than plants grown in traditional soil. Seeds are planted into an organic foam-like material, which cradle plants as they grow over time. There’s an added benefit: If plants must be treated for disease or pests, there won’t be any chemical runoff into nearby streams and lakes.