Brochure by the St. Louis Metropolitan Sewer District for private landowners about maintaining rain gardens.
(undated) Brochure for homeowners and private landowners by the St. Louis Metropolitan Sewer District. Preventative maintenance is key to minimizing major costs associated with repairs of rain gardens. A general rule of thumb to estimate maintenance costs is 3%-6% of the installation costs. Maintenance may be higher the first few years, while plants are being established.
Think of a rain garden as a sponge — an environmentally friendly sponge — that is designed to soak up much of this runoff before it can do damage. A rain garden starts with a bowl-shaped bed of loose soil. The garden is planted with deep-rooted trees, bushes, flowers and other plants that help absorb the rainwater, which filters through layers of soil before entering the groundwater system or to the stormwater system through the underdrain.