Rain gardens captured and filtered stormwater runoff, preventing pollution while creating pollinator habitat in low-lying yard areas.
The Function
Rain gardens: shallow depressions planted with native, water-tolerant plants that absorb rainwater from roofs, driveways, and lawns. Water infiltrates soil (recharging groundwater) instead of running into storm sewers carrying pollutants (fertilizer, oil, sediment) to waterways.
Typical size: 100-300 sq ft, 6-12 inches deep. Located 10+ feet from foundations to prevent basement flooding.
Native Plant Selection
Rain garden plants tolerate: periodic flooding (after rain) and drought (dry periods). Native choices: cardinal flower, Joe Pye weed, swamp milkweed, blue flag iris, and switch grass.
The ecological bonus: rain gardens support pollinators, filter nutrients, and increase biodiversity.
Municipal Programs
Many cities/counties offered rain garden incentives (2010s): rebates, free plants, design assistance. Maryland, Wisconsin, and Minnesota led programs to reduce Chesapeake Bay/Great Lakes pollution.
Design Resources
YouTube channels and extension services provided rain garden how-tos: calculate drainage area, size garden appropriately, dig contours, amend soil (increase infiltration), plant natives, and mulch.
Source
- University of Wisconsin Extension: Rain Garden guides (2005+, digital 2011+)
- YouTube peak: June 2011+
- Chesapeake Bay rain garden push: 2012-2016