A rain garden is a depression within the landscape that allows stormwater runoff from impervious surfaces to infiltrate and reduce the rate of flow before entering surface water. Typically rain gardens include deep rooted native vegetation that are mesic and/or wet tolerant species. Surfaces that have stormwater runoff include but are not limited to: roofs, sidewalks, driveways, parking lots, decks, patios, and sheds.
The benefits of a rain garden include:
Removal of pollutants from runoff before it enters surface waters (lakes, rivers, streams, and wetlands).
Prevents erosion due to the deep roots of the native vegetation holding the soil in place.
Attracts pollinators such as birds and bees.
Requires minimal watering and maintenance once established.