What is a rain garden?

A rain garden is a bowl-shaped shallow planted area in the landscape where rain water collects and absorbs back into the soil. It mimics the natural environment of the undisturbed soils and forests that once covered the Puget Sound area. 

It is designed to slow, filter, and infiltrate runoff from roofs or pavement to safeguard local water quality. A rain garden uses spongy living soils and native plants to achieve its goal.

Learn more about rain gardens.

Rain Garden Anatomy (JPG)


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1. What is a rain garden?
2. Why are rain gardens important?
3. Why build a rain garden?
4. Why use recycled materials in a rain garden?
5. Why use native plants in a rain garden?
6. How can I build a rain garden?
7. What is low impact development (LID)?