Avg. cost is $3-4 per square foot*
Do not need many materials
Require a proportionally smaller initial investment
Helps reduce flood damage in the event of a flood
Reduce the amount of pollution in excess runoff which in turn reduces treatment cost
Lifespan of 35 years or longer*
Minimal time and skill for upkeep
An hour per year of labor for debris removal
Check pH once or twice a year
Every 6 months add new mulch, every 2-3 years replace mulch layer
Replace dead plants when needed and inspect as needed
It is a common stormwater control measure that reduces runoff
Promotes local biodiversity
Increases effectiveness of hydrological and ecological functions of the local environment
Better water quality
Less erosion due to less storm runoff
Aesthetic feel which also promotes human interaction with the environment
Creates habitat for local species
Example: Birds, butterflies and bees
* Vineyard, Donald, Ingwersen, Wesley W., Hawkins, Troy R., Xue, Xiaobo, Demeke, Bayou, Shuster, and William. “Comparing Green and Grey Infrastructure Using Life Cycle Cost and Environmental Impact: A Rain Garden Case Study in Cincinnati, OH.” Journal of the American Water Resources Association (JAWRA), 2015.