This document provides guidance on creating an effective rain garden. It recommends choosing a location that allows rainwater to naturally drain into the garden, away from building foundations. The soil should be evaluated for drainage, and poor-draining clay soils may require replacement with a sand-topsoil-compost mix. The garden should have a ponding area 6 inches deep to collect rainwater, with different plant zones to suit varying water levels. An under-drain system may be needed in heavy soils or large gardens to improve infiltration. Preparing the soil properly and choosing suitable plants are keys to success.