American Horticultural Society
7931 East Boulevard Drive
Alexandria VA 22308
Information: (703) 768-5700
http://ahsgardening.org/

The American Horticultural Society inspires a culture of gardening and horticultural practices that creates and sustains healthy, beautiful communities and a livable planet.

Brighton Dam Azalea Garden
14501 Sweitzer Ln
Laurel, MD 20707
Information: (301) 206-4001

Established in 1959, Brighton Dam’s Azalea Garden is home to over 22,000 azalea bushes over 5 acres in a hardwood forest. Kousa dogwood trees were added in the 1990’s and the garden is also home to Montgomery County’s champion fringe tree (Chionanthus virginicus).

Brookside Gardens
Wheaton Regional Park
1800 Glenallan Ave.
Wheaton, MD 20902
Information: (301) 962-1400

50-acre display garden, two conservatories, horticultural programs for adults and children.

Dumbarton Oaks  
1703 32nd St, NW
Washington, DC 20007
Information: (202) 339-6401

Dumbarton Oaks supports research and learning internationally in Byzantine, Garden and Landscape, and Pre-Columbian studies through fellowships and internships, meetings, and exhibitions.

Green Springs Garden Park
4603 Green Spring Rd
Alexandria, VA 22312
Information: (703) 642-5173

Green Springs Garden Park has a wooded stream valley with ponds, a naturalistic native plant garden, more than 20 thematic demonstration gardens, a greenhouse, a plant shop, two gift shops, a historic house, and a horticulture reference library. The gardens and educational programs focus on practical landscaping and gardening techniques that are appropriate for the Washington metro area.

Hillwood Estate, Museum, and Garden
4155 Linnean Avenue, NW
Washington, D.C. 20008
Information: (202) 686-5807

Hillwood’s spectacular gardens capture the vision Marjorie Post conceived when building the estate in the 1950s. She designed the gardens to flower in the spring and fall, when she was in residence at Hillwood. Today, they offer something beautiful in every season.

Kenilworth Park & Aquatic Gardens
1900 Anacostia Ave SE
Washington, DC 20020
Information: (202) 692-6080

Deep within Kenilworth lies an oasis, hidden behind trees and cattails. It’s a place where beavers build their homes and turtles sleep on logs. Lotus blooms rise from the muck and lilies sit on the water. The wind dances with the dragonflies, rustling through the trees, carrying the song of the birds until it brushes across your face, fading to a whisper, saying “come join.”

Go mid-June through August, when the lotus are putting on a fabulous display.

Ladew Gardens
3535 Jarrettsville Pike
Monkton, Maryland 21111
Information: (410) 557-9466

One of the “10 incredible topiary gardens around the world.”
Welcome to Ladew Topiary Gardens, a place of ever-changing beauty, with 22 acres of spectacular award-winning gardens, more than 100 remarkable topiaries, a mile-long Nature Walk, and native Butterfly House.

Longwood Gardens
1001 Longwood Road,
Kennett Square, PA 19348
Information: (610) 388-1000
One of the world’s great gardens, Longwood’s story is one of legacy, innovation, and stewardship.

Spanning more than 1,100 acres, our Gardens showcase horticultural splendor, intricate fountain systems, architectural grandeur, and so much more—all with conservation at the core of our mission. With our spectacular displays and year-round, dynamic beauty—made possible by our renowned horticultural expertise—we are proud to be one of the most-visited gardens in the country.

Meadowbrook Gardens
9750 Meadowlark Gardens Ct
Vienna, VA 22182
Information: (703) 255-3631

Meadowlark Botanical Gardens in Vienna Virginia, has created three distinct native plant collections in support of the International Agenda for Botanic Gardens in Conservation. The largest of these is the Potomac Valley Collection (PVC).

Mt. Cuba Center
3120 Barley Mill Road
Hockessin, DE 19707
Information: (302) 239-4244

Mt. Cuba Center is a beautiful botanic garden committed to the conservation of native plants and their habitats. Take a virtual tour of our native plant gardens, register for classes, or learn about our research and conservation. Gardens are open Wednesday to Sunday, 10 am to 6 pm.

Nature Forward, Woodend Sanctuary
8940 Jones Mill Road
Chevy Chase, MD 20815
Information: (301) 652-9188

Nature Forward maintains beautiful demonstration gardens at Woodend, offers gardening clinics and classes,
holds seasonal native plant sales and can even bring expert help right to your garden!

US Botanic Garden
100 Maryland Ave., SW
Washington, DC 20001
Information: (202) 225-8333

Come explore the thousands of plants of the U.S. Botanic Garden! Learn more about our Conservatory, gated outdoor gardens, and Bartholdi Fountain and Gardens.

US National Arboretum
3501 New York Ave, NE
Washington, DC 20002
Information: (202) 245-2726

The U.S. National Arboretum enhances the economic, environmental, and aesthetic value of ornamental and landscape plants through long-term, multi-disciplinary research, conservation of genetic resources, and interpretative gardens and exhibits.