How it Works Best Location Plants to Use Benefits
How it Works
A rain garden, or bioretention area, is a planted area that collects and cleans rainwater coming from impervious surfaces, like roads, sidewalks, roofs, driveways and patios. The plants and soil in the garden slow down the water and filter out pollution before it reaches a storm drain or creek.
Rain gardens stay dry when it isn't raining. You'll typically see a bowl-shaped garden in someone's yard.
These gardens are not used to grow produce.
A bioretention area is a more engineered feature. You’ll see these on road and commercial projects. These features can be used to meet regulatory requirements.
Interested in installing a rain garden? Apply for Raleigh Rainwater Rewards. This voluntary program provides funding for projects that help preserve Walnut Creek and Crabtree Creek in Raleigh.
- Areas that collect a lot of rainwater
- Where water naturally flows to a stream or the stormwater system
- In soils that quickly absorb water
- Placed at least 10 feet away from a building
What to avoid:
- Putting the garden near underground utilities
- Using the garden to solve flooding issues
How rain gardens and bioretention areas are built varies by location and need.
Plants to Use
There are several plants native to North Carolina that work well in rain gardens.