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Rain Garden

Rain Garden

Green Solutions to Stormwater Pollution

During a downpour, water gushes out of downspouts and across pavement, picking up pesticides, fertilizers and other pollutants along the way. A rain garden is a shallow depression filled with native plants that act like a sponge and natural filter to keep pollutants out of our local streams, rivers and lakes.

A rain garden can:
  • Reduce stormwater runoff
  • Improve water quality
  • Reduce drainage issues and flooding
  • Help keep pollutants out of local waterways
  • Create thriving habitats for birds, bees and butterflies



Great Parks Rain Gardens


Winton Woods – Winton Centre

ohio-epa-logo-color-spec2012The Rain Garden at Winton Centre was completed in spring 2014 thanks to the hard work of staff as well as corporate, community-based and Great Parks volunteers. This project was financed in part through a grant from the Ohio

Environmental Protection Agency under the provisions of the Surface Water Improvement Fund. Matching funds and in-kind donations were provided by Great Parks.

The project was completed in two phases. Phase One of this project was the creation of a bio-swale and 1,300-square-foot rain garden to capture runoff and slow down stormwater. This allows plants to utilize the water and to allow some of the water to percolate into the soil. The bio-swale and rain garden also function as a filter, removing pollutants as the water moves through. Phase Two was the addition of 2,500 square feet of permeable pavers in the parking lot.

Create a Rain Garden at Home

You can make your own rain garden right in your own backyard! Plant one near a downspout or driveway, and you'll help protect your community from flooding and drainage problems while turning your yard into a beautiful habitat for local wildlife.

Common questions:


Will my rain garden become a breeding ground for mosquitos?
A rain garden is constructed and planted to help water to evaporate and infiltrate. Rain gardens are generally designed so the water dissipates in less than a day. For mosquitos the transition from egg to adult mosquito takes three to seven days.

Can I plant a rain garden in clay soil?
Rain gardens can work in clay soils, but there are some things you can do to help your garden along. The first thing is to make sure you run an infiltration test before constructing the garden. Choose a bed depth that will drain in one day.

What kind of plants should I use?
Hardy plants that can stand up to both drought and flooding conditions work best. Native plants are even better, because they are already adapted to our local climate, conditions and soil. Many of our native prairie grasses and wildflowers have very deep root systems that break up heavy soils and increase filtration.

Rain Garden Guidelines for Southwest Ohio, pages 19-22
Will I need to water my rain garden?
During the first growing season, while the young plants are getting established, you should water the garden during dry spells. In subsequent years, only water the garden during long dry spells.

How much does it cost to build a rain garden?
If you build the rain garden yourself, the major cost elements are plants, compost or peat moss, and mulch. If you use plugs or small plants, a rain garden can be very economical. Plant costs increase as you pick larger plants.

Will my rain garden cause water to seep into my basement?
A common cause of wet basements is improper grading and drainage around house foundations. Make sure you locate your garden carefully and direct the overflow from the garden away from the house.


More Resources