A green solution to stormwater
Rain gardens are designed to mimic the layered conditions of a forest floor, which naturally filters pollutants from water. The rain garden consists of a vegetated or stone ponding area, a mulch layer, a planting soil layer, a sand bed, and a gravel base. The multiple layers work together to filter pollutants from water, allowing it to infiltrate into the groundwater supply less contaminated. Using native plants in rain gardens can be beneficial, as they are acclimated to the local climate and therefore, require less maintenance than introduced species. Native plants also contribute to the preservation of Pennsylvania’s plant heritage. More than 2,100 native plant species grow in Pennsylvania.
Green Infrastructure Resources