Chanticleer, the main house, April 2007
|Location||786 Church Road in Wayne, Pennsylvania|
|Area||48 acres (19 ha)|
|Architect||Zantzinger, Borie and Medary|
|Architectural style||Colonial Revival, Colonial, Pastoral|
|NRHP reference #||84003350|
|Added to NRHP||July 24, 1984|
Chanticleer Garden is a forty-eight-acre botanical garden built on the grounds of the Rosengarten estate at 786 Church Road in Wayne, Pennsylvania. Located on Philadelphia's historic Main Line, Chanticleer retains a domestic scale and is welcoming to visitors for relaxation, walking, and picnics. The grounds became open to the public in 1993. Visitors are welcome to tour the estate seasonally, from April through October. The house and grounds were added to the National Register of Historic Places in 1984.
The estate was built in 1912 as a summer cottage for Christine Penrose and Adolph G. Rosengarten, Sr., the latter of whom was the head of Rosengarten & Sons, a Philadelphia pharmaceutical manufacturer that his family had founded in 1822 to produce quinine. The company later merged with Merck & Co in 1927. Upon inheriting the estate, their son, Adolph G. Rosengarten, Jr. established a foundation to ensure that Chanticleer would be developed as a public garden.
The name Chanticleer is derived from the French word for rooster, "chanticleer" . The entrance gate is crested with carved stone rooster and other references to roosters can be found throughout the estate. Adolph G. Rosengarten, Jr. hired Christopher Woods, a native of Britain, to develop the garden. After Rosengarten, Jr.'s death in 1990, Woods became the founding Executive Director and began a radical revision of the garden. He tore down Mr. Rosengarten's stone house to create what is now known as "The Ruin". 
- Chanticleer House, the Main House, connecting to the entrance and Teacup Garden, which includes an open air porch, providing a popular spot for visitors to sit and relax
- Asian Woods, planting for which began in 1995, after being cleared the previous year, and now hosting a variety of species native to Korea, Japan, and China, but in the style of an American woodland garden
- Pond Garden, a large man-made circular pond constructed in the early 1970s, acting as a mirror for the trees that surround it
- Teacup Garden, a small-scale garden serving as the entrance courtyard to the property
- Minder Woods, a heavily vegetated area with towering red oaks and dark green pines, firs, false cypresses, and hemlocks, accessible via meandering stone paths
- Tennis Court Garden, estate's old tennis court, transformed into a dynamic garden
- "The Ruin" Garden, the Minder House, built in 1925 and razed in 1999 to offer a series of spaces, pools, and fountains
- Gravel Garden, small garden spaces, connected by a series of steps, and home to a variety of species of plants that are rare to the area and climate
- Cutting Garden, a traditional cottage garden with a series of arches, fashioned from rebar and driftwood, providing venues for clematis and annual vines
- Vegetable garden, where rustic benches help frame a simple traditional American vegetable garden
- Bell's Run, with adjacent woods giving way to undulating lawns, a stream, and a functional 1940s waterwheel
- Bell's Woodland, opened in April, 2012, consisting mostly of plants eastern North American forest
- Bulb Meadow, on a hillside, highlighted by Spanish bluebells and fragile daffodils
|Wikimedia Commons has media related to Chanticleer Garden.|
- "National Register Information System". National Register of Historic Places. National Park Service. March 13, 2009.
- Jacki Lyden, Chanticleer: A Botanical Distraction From Daily Life, National Public Radio, June 17, 2012.
- Higgins, Adrian; Cardillo, Rob (2011). Chanticleer: A Pleasure Garden. University of Pennsylvania Press. pp. 192 pages.
- Carl E. Doebley, 1984, NRHP Nomination Form for Chanticleer Enter "public" for ID and "public" for password to access the site.
- Michael A. Flannery, Civil War Pharmacy: A History of Drugs, Drug Supply and Provision, and Therapeutics for the Union and Confederacy; published by The Haworth Press, Binghamton, New York 2004
- Chanticleer Garden: a history Archived September 16, 2009, at the Wayback Machine
- Chanticleer, a review by The Longwood Graduate Program, Public Horticulture, University of Delaware, 2007 Archived May 19, 2011, at the Wayback Machine
- "Chanticleer Garden". www.chanticleergarden.org. Retrieved October 1, 2017.