A trellised terrace opens up to a quieter view of a magnificent existing redwood grove and bioswale filled with clusters of ornamental grasses and perennials. Photography by Marion Brenner

A rain chain collects roof runoff and delivers it to the rain garden. The rain garden collects water and lets it soak into the ground slowly, so it doesn't run off into nearby waterways.

A natural stone pathway winds around the rain garden. The rain garden collects rain water so it soaks into the ground gradually. This keeps excess water from running off into local waterways.

u2014 ALE: Wayne Rain Garden Pennsylvania Landscape & Nursery Association u2014 ALE: Wayne Rain Garden Terren Landscapes http://www.terrenlandscapes.com 2014 PLNA Awards for Landscape Excellence winner Category: Residential Up to $15,000 Award Level: Gold Project Description: Our company was contracted by the client to provide a creative solution to an ongoing drainage problem. Their property is located within 30 feet of a local stream that collects storm water from the surrounding area. The nearby stream and high water table caused the lawn area at the side of their home to flood and to remain waterlogged for a few days after each storm. The client not only had difficulty growing plants in the existing conditions, but also had a problem with mosquitoes due to standing water. Our goal was to design a self-contained, naturalistic rain garden that slowed storm water runoff, allowed for percolation, and promoted infiltration while permitting excess clean water to enter the nearby stream with diminished force. As designed, the rain garden allows the earth to slowly and more naturally absorb excess storm water while filtering out toxins such as excess nitrogen and phosphorous which are frequently found in the landscape, therefore reducing the contaminants entering the stream. A percolation test was conducted with criteria of absorbing a one-inch rainstorm within four hours without overflow. The one-inch storm calculation included an existing downspout from the home, which would be piped into the rain garden to reduce roof runoff. The first test failed due to a deep layer of high clay-content soil. Excavation continued until a layer of sandy loam was reached, the percolation test was repeated, and a successful test result was achieved. Next, the entire rain garden basin was excavated to the sandy loam layer and the soil amended with compost and sand to create a highly porous planting media. Geotextile fabric was placed to help reduce migration of the surface stone into the soil and allow for minimal maintenance. Gravel, river stone and small boulders were carefully placed to achieve the look of a natural streambed. A palette of mostly native plants with a few non-invasive ornamentals were chosen for their ability to survive in extreme conditions ranging from floods to drought and were placed according to their specific preferences. Wetland plants were chosen for the lowest portion of the rain garden as that area remains saturated for longer periods of time, with a Chionanthus virginicus as a focal point surrounded by irises and ferns at the lowest depth. Plants tolerant of drier conditions were chosen for the upper edges of the garden. The beautiful colors of Monarda, Ligularia, Eupatorium, Solidago, Chelone, and Rudbeckia were scattered within the upper edge, while movement and softness were incorporated by use of the graceful Nassella that lines the border. Finally, winter interest was provided with a backdrop of Cornus sericea. As built, this small rain garden creates tremendous impact by decreasing the amount of storm water runoff not only on our client's property, but also in the neighboring stream. It serves as a means of slowing the water and providing an area for infiltration back into the earth. The plants provide a habitat for birds, butterflies, and insects, working in harmony with nature and providing beautiful visual interest year-round. Photo Credit: Lisa C. Falls

This rain garden has grown to maturity in three years Photo by Amy Whitworth Installation by Creative Touch Landscaping
Photo of a small craftsman front yard garden path in Portland for fall.

A rain garden on the property line is shared by both neighbors and provides a beautiful solution to a common problem Design by Amy Whitworth Installation and Stonework by Stormwater Resource Group

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A rain garden dry stream bed.
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After image. This rain garden built into the hillside collects storm water onsite and allows it to percolate through the soil into the groundwater.
This is an example of a traditional landscaping in Minneapolis.

Scott & Catherine Buley, High Tech Turf & Trees/Rain Garden Nursery

Terren Landscapes http://www.terrenlandscapes.com Project Entry: Pembrooke Estate Rain Garden 2014 PLNA Awards for Landscape Excellence Winner Category: Sustainable Landscape &60,000-$120,000 Award Level: Silver Project Description: The client contracted our company to solve multiple existing drainage problems. In a heavy rain event the existing French drain system would overflow, causing water to pool in the driveway. After investigating the system we found that the capacity of the French drain was undersized for the amount of storm water from the large rain events received in recent years. As a result of our findings and at the request of the homeowner, we designed a storm water management system to capture all storm water from the structures on the property and regenerate the underground aquifers for the volume of a 5.8” rainstorm. In addition to the new drain system, the homeowners wanted a rain garden to provide a backdrop for an existing formal garden, provide a habitat for wildlife, and provide screening from an adjacent neighbor. Throughout the design process many challenges were presented, including an existing gas line, which ran directly through the area that best suited the bioswale. The existence of the gas line caused us to alter the shape and depth of the bioswale in some areas. We also inspected the existing downspouts to make sure there were no obstructions that would impede the system’s efficiency, and then conducted a test pit dig to make sure we had sufficient percolation rates for disposal of storm water. To effectively capture the storm water runoff, the existing downspouts were piped from the main house and the large detached garage to a large catch basin located at the low point in the driveway. The driveway catch basin contains two outlet pipes at different elevations within the basin allowing water from smaller rain events to enter the bioswale and rain garden area to percolate into the soil before excess water overflows into a sediment trap which filters out any debris and is then piped to an underground StormTech® pit to slowly percolate into the ground. The other outlet pipe in the driveway catch basin is used for larger storm water events, taking the water directly to the StormTech® pit. Accepting and slowing the velocity of the storm water, mitigation of erosion, and filtering out pollutants contained in the “first flush” of rainfall are the primary functions of the bioswale and rain garden. Planting these areas with mostly native plant species helps carry out these functions while attracting and providing shelter for wildlife. The ‘Niobe’ weeping willow is the centerpiece of the rain garden, connecting with the axis of the existing formal garden. To screen the neighboring property we chose Chamaecyparis nootkatensis ‘Pendula’ for its graceful evergreen habit and tolerance of wet sites. ‘Ivory Halo’ dogwood and Panicum ‘Cloud Nine’ were used for screening as well as winter interest. To provide deciduous structure to the garden Taxodium distichum and Magnolia virginiana were used in conjunction with witch hazel. Mostly native wetland perennials were used due to their tolerance of wet conditions and occasional drought. The area above the StormTech® pit provides space for the client’s family to relax. The rain garden and bioswale provide screening, storm water management, a habitat for wildlife, and plants that enhance the adjacent formal garden. Photo Credit: Terren Landscapes

Design ideas for a traditional gravel landscaping in Philadelphia with a pergola.

u2014 ALE: Wayne Rain Garden Pennsylvania Landscape & Nursery Association u2014 ALE: Wayne Rain Garden Terren Landscapes http://www.terrenlandscapes.com 2014 PLNA Awards for Landscape Excellence winner Category: Residential Up to $15,000 Award Level: Gold Project Description: Our company was contracted by the client to provide a creative solution to an ongoing drainage problem. Their property is located within 30 feet of a local stream that collects storm water from the surrounding area. The nearby stream and high water table caused the lawn area at the side of their home to flood and to remain waterlogged for a few days after each storm. The client not only had difficulty growing plants in the existing conditions, but also had a problem with mosquitoes due to standing water. Our goal was to design a self-contained, naturalistic rain garden that slowed storm water runoff, allowed for percolation, and promoted infiltration while permitting excess clean water to enter the nearby stream with diminished force. As designed, the rain garden allows the earth to slowly and more naturally absorb excess storm water while filtering out toxins such as excess nitrogen and phosphorous which are frequently found in the landscape, therefore reducing the contaminants entering the stream. A percolation test was conducted with criteria of absorbing a one-inch rainstorm within four hours without overflow. The one-inch storm calculation included an existing downspout from the home, which would be piped into the rain garden to reduce roof runoff. The first test failed due to a deep layer of high clay-content soil. Excavation continued until a layer of sandy loam was reached, the percolation test was repeated, and a successful test result was achieved. Next, the entire rain garden basin was excavated to the sandy loam layer and the soil amended with compost and sand to create a highly porous planting media. Geotextile fabric was placed to help reduce migration of the surface stone into the soil and allow for minimal maintenance. Gravel, river stone and small boulders were carefully placed to achieve the look of a natural streambed. A palette of mostly native plants with a few non-invasive ornamentals were chosen for their ability to survive in extreme conditions ranging from floods to drought and were placed according to their specific preferences. Wetland plants were chosen for the lowest portion of the rain garden as that area remains saturated for longer periods of time, with a Chionanthus virginicus as a focal point surrounded by irises and ferns at the lowest depth. Plants tolerant of drier conditions were chosen for the upper edges of the garden. The beautiful colors of Monarda, Ligularia, Eupatorium, Solidago, Chelone, and Rudbeckia were scattered within the upper edge, while movement and softness were incorporated by use of the graceful Nassella that lines the border. Finally, winter interest was provided with a backdrop of Cornus sericea. As built, this small rain garden creates tremendous impact by decreasing the amount of storm water runoff not only on our client's property, but also in the neighboring stream. It serves as a means of slowing the water and providing an area for infiltration back into the earth. The plants provide a habitat for birds, butterflies, and insects, working in harmony with nature and providing beautiful visual interest year-round. Photo Credit: Lisa C. Falls

This environmentally minded client in Milford Michigan. contacted us to create a rain garden. They were both master gardeners and had a very specific plants that they wanted to utilize in the waterwise location. The area was a small triangle shaped piece of ground between two driveways. We creatd a natural depression in the center of the garden for the rain to accumulate once the rain barrel was to capacity. The soil that we removed was used to fill the small raised planter bed that we constructed. This would keep the water away from the foundation and give the homeowners a spot to add a Green Japanese Maple and Hydrangea who like it a little drier. We then installed natural michigan fieldstone boulders as a transition form the grade level to the rain garden. Black onyx stone was used to frame the entire garden and it works very well with all of the colorful plant material. Landforms Inc.

The trough collects overflow and moves towards a rock and metal channel within the rain garden, and toward the forests and escarpment. This linear view occurs at the large windows in the master suite, and was our response to a specific client request, that directs views from an expanse of windows to sunrises in the east. Photo Credit :Rebecca A O'Neal

Rain water spills over a ledge and into a rock trough, ultimately filling a geometric bog planted with native aquatics. In dry seasons, an automatic fill is activated and creates a similar effect. During intense rains, the bog overflows into a curvilinear rock rill, and ultimately to the ravine below. Photo Credit :Ralph Anderson

The natural stone patio and pathway are defined by varied plantings in the rain garden. The wooden fence provides a sense of refuge and a backdrop for the plants.