In 1926, landscape architect Willard Gebhart created a landscape moulded around the 25 acres and estate later owned by Post. When renovating Hillwood, Post incorporated many of the garden designs into her interior design, creating the 'garden rooms' which feature touches unique to the Lunar Lawn and Rose Garden. The center of the court features a statue of a young
Eros surrounded by
English ivy and
boxwoods. Eros holds a goat and pulls an arrow from his quiver, representing fertility and love.
French parterre Following the tradition of
parterre gardens, the Hillwood parterre is a formal garden with low detailed plantings divided with footpaths and walls of
English ivy. Also designed by Innocenti and Webel, the garden was split into four areas using channels of moving water, gravel footpaths and a central pool lined with Italian glass tile. A
terracotta sculpture of
Diana overlooks the garden. She is accompanied by marble
sphinxes, a cherub riding sea animals in the central pool, as well as outdoor furniture from Post's collection. This garden serves as a Post's tribute to 18th-century French aristocracy. Events were hosted for the
Boy Scouts of America and the
National Symphony Orchestra. The
Washington Monument is visible from the lawn, which is framed by
American elms. Evergreen,
false cypress, azaleas, camellias, dogwoods and magnolia are also found in the Lunar Lawn. Every season the horticulture staff rotates out flowers, a tradition set by Post. A large statue of a lion, dating from early 18th-century England, rests toward the house. 1960s blue and white lawn furniture is placed on the lawn during warm weather months, adding a modern twist to an often historical seeming outdoor environment. A gold gilt swan fountain is placed on one wall, and
satyrs stand near the terrace. A stream cascades along the hillside and pools appear, with stones placed to provide safe crossing. A figurine of
Hotei, a small sculpture of a tortoise and small
Tōrōs are found throughout the garden. The garden also combines native and Japanese plants including
Japanese pines,
Colorado blue spruce, maples, azaleas, and false cypress. The building features whole-log architecture and detailed carvings around the windows and door. The building houses changing exhibitions.
Cutting garden and greenhouse The cutting gardens serve as the Hillwood's main source for fresh flowers, as per Post's desire to have fresh flower arrangements throughout the house and grounds year round. The selection of flowers dates back to the 1950s, while the greenhouse was rebuilt in 1996 and looks as it did when Post was alive. The greenhouse serves as horticulture staff offices, work spaces, and home to Hillwoods famous collection of orchids.
Adirondack Building Representative of Post's retreat, Camp Topridge in the
Adirondack Mountains, the Adirondack Building, which was built 10 years after Post's death, serves as a museum programming venue. ==Outreach==