Downspout Planter

Image Credit: AKRF, Inc.

A downspout planter is a containerized landscape bed that utilizes rainfall from roof runoff for irrigation and manages the stormwater as a rain garden would. Because a downspout planter works much like a rain garden, it may provide the same nonstructural strategies and TSS removal objectives as a rain garden. However, downspout planter does not currently appear in the NJ BMP manual. The downspout planter is typically placed alongside the building where water from the downspout can flow into the planter, infiltrate through the soil mix and gravel layer and can drain out through an underdrain pipe. Alternately, stormwater may flow directly into the soil mix layer, allowing the water to infiltrate down into the subsoils instead. Structural components include the roof downspout, an underdrain and overflow structure if warranted. Downspout planters can create visual appeal and are often used as a high-performance alternative to traditional landscape planters.

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