Glenstone offers 230 acres of landscape fully integrated with the architecture and art. The landscape includes paths, trails, streams, meadows, forests and outdoor sculptures throughout the grounds.

Organic Landscaping

We have followed an organic approach to landscaping since 2010, working hard to identify gentle alternatives to harsh chemicals in order to maintain a healthy environment for our visitors and native wildlife. We maintain our own composting station and produce compost tea, which we use as a fertilizer and soil amendment throughout the grounds.

The landscape was designed by PWP Landscape Architecture.

Our Environmental Center is a multi-use maintenance and education facility that offers experiential learning. Here, in 2019, you can learn about our efforts in composting, organic landscape management, waste reduction, materials recycling and water conservation—and how to take these practices home with you.

Reforestation

We planted trees, understory vegetation and groundcover flora as part of our reforestation efforts. From 2013−2018, we planted more than 7,000 trees, in addition to thousands of shrubs, annual and perennial grasses, and flowers.

We plant only native, regionally appropriate species, which require the fewest resources to maintain and provide appropriate food and habitat for local fauna.

Water

Glenstone is home to several distinct aquatic ecosystems including the Greenbriar Branch stream, a large pond and a smaller lily pond situated along the Bridle Trail.

We use these ponds as well as three new underground cisterns to manage rainfall flow throughout the property and recycle the water for landscaping purposes. When combined, our cisterns have the capacity to hold nearly one million gallons of water. We constantly monitor the moisture of all soils to conserve as much water as possible and only supply additional irrigation when and where it is needed.

In addition to its water recycling program, Glenstone has committed to restoring the two depleted tributaries of the Potomac River located on the property. In close coordination with Montgomery County, in 2015 we implemented a plan designed to improve water quality, reduce sediment reaching the Potomac, and renew the wildlife habitat for aquatic organisms.

Meadows

The meadow unifies the landscape and emphasizes the contours of the restored terrain. In cultivating nearly forty acres of meadow spread throughout the grounds, we chose specific grasses and wildflowers that will nurture a balanced ecosystem. Over time, the grasses will grow to about three feet in height.