Rain gardens infiltrate water, remove pollution, provide wildlife habitat and delight the senses.
Rain gardens have many benefits including:
- Manage stormwater on site. Rain gardens reduce flooding and erosion associated with large amounts of stormwater entering streams during heavy rainfalls.
- Help recharge the aquifer. By capturing water and allowing it to percolate into the soil, rain gardens help replenish local aquifers.
- Filter out pollutants to reduce contamination of groundwater. Ongoing research suggests that rain gardens can be quite effective at filtering out some of the most common pollutants in stormwater, including chemicals, metals, fertilizers, and pesticides. Charged soil particles can attract and absorb metals and chemicals; microorganisms decompose pathogens and organic litter; and plants can filter out and utilize the nitrogen and phosphorous contained in fertilizer runoff.
- Delight the senses. The diversity of plant textures, colors and fragrances possible in rain garden plantings can enhance the appearance of a home landscape.
- Attract wildlife. Plantings that provide food, nectar and shelter for wildlife can help preserve biodiversity.
(2009) University of Delaware Cooperative Extension.