<p>A rain garden sounds decorative, and in one sense it is. Plants can make a curb edge or courtyard more attractive. But the idea is more exact than the name suggests. A rain garden is a shallow planted area positioned to receive runoff from roofs, paths, or roads. Instead of sending every drop immediately into a drain, it holds water briefly so that soil and roots can slow, filter, and absorb part of the flow.</p>

<p>The effectiveness of such a garden depends less on enthusiasm than on placement. A basin that is too small, badly graded, or set where water cannot reach it will disappoint. One placed carelessly against a building may create the very problems it was meant to reduce. Successful designs study slope, soil, and movement before they celebrate flowers.</p>

<p>What makes rain gardens valuable at city scale is their modesty. No single plot solves stormwater pressure for an entire neighbourhood. Yet many small captures distributed across streets, schools, offices, and homes can change how quickly water races through a drainage system. Their lesson is simple: infrastructure does not always need to be large to be serious.</p>