Rain Garden

A rain garden is best for that low area, most likely near a gutter, in your flower bed that is constantly washed out. It is designed so that when it rains the water is redirected for native plants to enjoy the water. It is the best way to reduce runoff in your garden beds and it will save you some headache that a wash out can create. Pictured below are some examples of a rain garden.

For more information check out:

Soak Up the Rain: Rain Gardens | US EPA