Rain gardens are, at their simplest, shallow hollows that collect rainwater, usually featuring a variety of plants. They are designed to deal with periods of flooding and drought, and help prevent localised flooding while providing homes for wildlife.
Gardening For Rainwater: Creating a Rain Garden
How to Build a Rain Garden - TOLEDO-LUCAS COUNTY RAIN GARDEN INITIATIVE
Manage storm water around your home with a rain garden, Home/Garden
How to Build Your Own Residential Rain Garden ~ San Antonio River Authority
Rain gardens / RHS Gardening
How to Make a Rain Garden for Bees- Carolina Honeybees
How to make a rain garden - Quora
Learn How to Build a Rain Garden • Haverford Township Free Library
How to Make a Rain Garden