Institutional HSA Certified Holly Arboretums Test Centers

An organization recognized by the Holly Society of America as an official Holly Arboretum or Experimental Test Center is a public or semi-public institution that educates plant lovers in the use of holly in the landscape and that complies with set HSA guidelines. Its holly collection is properly labeled and it maintains accurate records of its hollies so that each plant can be identified by location, valid name, source, date received, size or age when received, and other pertinent facts. Annual reports submitted by Official Holly Arboreta and Experimental Test Centers are included in the Holly Society Journal.

GUIDELINES FOR Institutional HSA Certified Holly Arboretums Test Centers
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Reports are avaliable on the Membership Pages.

Chollipo Arboretum
Taean-Gun, Chungchongnam-Do, Republic of Korea
USDA Hardiness Zone 7-8
bgci.org/garden.php?id=585

Clark-Landsbaum Deming Park Arboretum
and the Friends of the Arboretum, Inc.
Terre Haute, Indiana
USDA Hardiness Zone 5b
hollyfota.org/index_demingpark.htm

Cylburn Arboretum
4915 Greenspring Ave, Baltimore, MD 21209
cylburn.org

The Dawes Arboretum
Newark, Ohio
USDA Hardiness Zone 5b
dawesarb.org

Heartwood Nursery, Inc. and Enviromental Preserve
Felton, PA
USDA Hardiness Zone 6b
heartwoodnurseryinc.com

Jardin Arboretum d’Ilex
Formerly Arboretum des Pres des Culands Conservatoire National d’Ilex
Orleans, France

Longwood Gardens
Kennett Square, PA  19348-0501
USDA Hardiness Zone 7a
longwoodgardens.org

Missouri Botanical Garden
St. Louis, Missouri
USDA Hardiness Zone 6b
mobot.org

The Morris Arboretum of the University of Pennsylvania
Philadelphia, PA
USDA Hardiness Zone 6
business-services.upenn.edu/arboretum/index.shtml

The Polly Hill Arboretum
West Tisbury, Martha’s Vineyard, MA
USDA Hardiness Zone 7a
pollyhillarboretum.org

Rutgers Gardens
New Brunswick, NJ
rutgersgardens.rutgers.edu

The Scott Arboretum of Swarthmore College
Swarthmore, Pennsylvania
USDA Hardiness Zone 6
scottarboretum.org

The Tyler Arboretum
Media, PA
USDA Hardiness Zone 6
tylerarboretum.org

University of Tennessee Arboretum
Oak Ridge, TN
utarboretum.tennessee.edu

The United States National Arboretum
Washington, DC
usna.usda.gov

University of Washington Botanic Gardens
Seattle, WA
USDA Hardiness Zone 8b
depts.washington.edu/wpa/general.htm