What is the primary feature of a rain garden?

The primary feature of a rain garden is its ability to absorb rainwater runoff. Rain gardens are specifically designed to trap, infiltrate, and filter stormwater, allowing it to seep into the soil rather than being directed into storm drains or waterways. This process helps to manage excess rainwater, reduce flooding, and minimize erosion while improving water quality by filtering pollutants through the soil and plant roots.

While using native plants can enhance the effectiveness of rain gardens, it is not an exclusive requirement for their function. Aesthetic aspects, like providing a decorative water feature, can be a supplementary benefit, but they are not the primary goal of a rain garden. Similarly, while enhancing soil texture can be a result of planting and maintaining a rain garden, it is not the primary function. The main purpose remains the management and absorption of rainwater runoff, which is crucial for sustainable landscape design and environmental health.