From Rock to Rain Garden: Smart Stormwater Management in Action – TTI’s 2026 Earth Day Project

Rain Gardens: A Smart, Beautiful Solution for Stormwater Management

A rain garden is far more than an attractive landscape feature. It is a carefully designed, shallow depression planted with native vegetation to capture, slow, filter, and absorb stormwater runoff from impervious surfaces such as roofs, driveways, parking areas, and compacted lawns. Instead of allowing rainfall to rush untreated into storm drains and nearby waterways, a rain garden works like a natural sponge, helping water soak gradually into the ground while reducing flooding, erosion, and pollution.

At TTI Environmental, our recent rain garden project shows how a practical environmental solution can also become a meaningful team effort. What began in part as a need to address drainage and gutter routing on the north side of the building evolved into a functional, attractive rain garden that now supports both stormwater control and habitat creation.

How Rain Gardens Work

Rain gardens are designed to temporarily hold water after a storm, but not for so long that mosquitoes can breed. In a properly designed system, water is captured, filtered through soil and plant roots, and returned to the ground within roughly 24 to 48 hours. This process reduces the volume of water entering the storm drain system, which helps limit the transport of pollutants such as sediment, fertilizers, trash, oils, and pet waste into local waterways.

Unlike conventional turf grass, rain gardens are planted with native species that are adapted to local soil and climate conditions. These plants generally require less maintenance once established and offer added environmental benefits by supporting pollinators and wildlife.

Environmental Benefits

Rain gardens deliver a range of environmental advantages:

• Reduce stormwater runoff.
• Help prevent localized flooding.
• Improve infiltration and recharge groundwater.
• Reduce erosion and streambank damage.
• Filter pollutants before they reach creeks, rivers, and lakes.
• Provide habitat for birds, butterflies, bees, and other beneficial wildlife.
• Require less long-term maintenance than traditional lawns.

In addition to these measurable benefits, rain gardens also contribute to a healthier and more resilient landscape by helping mimic the natural hydrologic cycle that development often disrupts.

TTI’s Rain Garden Project

The TTI garden is a great example of how stormwater management and environmental stewardship can go hand in hand. The day after the garden was planted (on 4/25), 0.18 inches of rainfall occurred, and the rain garden held up to 900 gallons of water. Compared with a lawn of equal size, a rain garden can allow at least 30% more water to infiltrate into the ground, making it an effective tool for reducing runoff and improving site drainage.

The project included 36 native plants in an approximately 35-foot by 15-foot area. These plants were chosen not only for their visual appeal, but also for their ability to thrive in a rain garden setting and support local ecology. Some of the species selected for the site included:

• Blue lobelia
• Cardinal flowers
• Boneset
• Goldenrod
• New England asters
• Little bluestem
• Carousel grass
• Indiangrass
• Purple coneflowers
• Oakleaf hydrangeas
• Milkweed
• Bee balm

Team Effort – Click to view the entire project 2026 earth day rock to rain garden

One of the most rewarding parts of this project was the volunteer effort behind it. More than 25 employees contributed to the work by researching and helping design the garden, conducting infiltration testing, moving rocks, clearing existing vegetation, operating a skid steer and excavator to shape the area, adding topsoil and organic leaf mulch, digging holes, planting vegetation, spreading mulch, and watering the new landscape.

The project also created a great opportunity for team building. Employees who do not often see one another in the office were able to work side by side, share stories, enjoy lunch together, and celebrate the day with an unexpected visit from Mister Softee. It was a reminder that environmental projects can build both sustainable landscapes and stronger workplace connections.

Resources and Inspiration

This project drew on guidance from the Rutgers Rain Garden Manual of New Jersey and was informed by CCD project work completed with a UPS client in South Brunswick, New Jersey. Those resources helped shape a practical and effective approach that blends stormwater management, native planting, and site-specific design.

Why Rain Gardens Matter

Rain gardens are a simple but powerful example of how thoughtful design can solve environmental problems while improving a property’s appearance and ecological value. They reduce pressure on storm sewer systems, help protect waterways, support native species, and offer organizations a visible way to demonstrate environmental responsibility.

For companies, schools, municipalities, and homeowners alike, rain gardens are a reminder that sustainable solutions can be both functional and beautiful.

 

For more information about Rain Garden construction click to read and download this instructional guide provided by Rutgers:  http://files.water.rutgers.edu/Water%20Resources%20Program/Rain_Gardens/RGWebsite/misc/Compiled.pdf