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Hardy Palms •
A Quick Reference |
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Palms
are listed in order of approximate cold hardiness. Low temperature
listings reflect what mature plants may survive under average garden
conditions in the southeastern United States. Sizes given are also typical
for growth in the Southeast.
Please
note that hardiness depends on more than absolute low temperatures,
especially in marginal areas. Duration of cold, daytime high temperatures,
amount of sunlight and wind, and the plant's general health and maturity also affect
winter survival. Palms generally gain hardiness with age and size. Protect
small (1- to 3-gallon size) newly-planted palms for several winters in marginal areas.
The species on this page are among the most
commonly-available hardy palms from garden centers or mail order. Dozens
of additional uncommon species are discussed in the upcoming book Hardy
Palms for the Southeast. Watch this web site for future announcements
on the book's availability.
Information and photos provided by Southeastern Palm Society
members.
Click on thumbnails for larger photos.
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Rhapidophyllum hystrix
NEEDLE PALM
Hardiness: Zone 6b or slightly colder when established, making it the world's
hardiest palm. Needs excellent siting for long-term survival in Zone 6.
Description: A clumping palm with medium-green
leaves, growing slowly to eight to 10 feet tall and wide. Forms a stubby
trunk with age. Named for the sharp needles that protect the crown, though
the needles remain safely away from children and pets. One of the easiest
palms to grow in the Southeast. Use as a specimen or hedge in sun or
shade, though the needle palm is a little more open and attractive in
half-day shade or filtered sunlight.
Origin: River floodplains from South Carolina to
Florida and Mississippi,
with
populations extending far inland to central Georgia and northeastern Alabama.
1. This needle palm in Knoxville, Tennessee,
survived a low of around -20°F in 1985.
(photo: Will Taylor)
2. Needle palm blossom, Apison, Tennessee.
(photo: Jeff Stevens)
4. Needle palm in habitat near Louisville,
Georgia. (photo: Joe LeVert)
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Sabal minor
DWARF PALMETTO
Hardiness: To -5°F, with leaf damage beginning at around 5°F.
Description: A
shrub-sized palm with bluish leaves, growing four to six feet tall and wide.
Use as a specimen or tall groundcover. The seed attract birds. As with all
Sabals, it grow in sun or light shade, with fastest growth in sun.
Origin: North Carolina to Florida and Texas, extending inland to
central Georgia,
northeastern Alabama and southeastern Oklahoma. The most
widely-distributed palm in the Southeast—and in the United States.
The larger Louisiana palmetto (Sabal minor
var. 'Louisiana') forms a short trunk after many years and may be
slightly less hardy. Possibly a western ecotype of Sabal minor.
Native to east Texas and Louisiana.
1. Daniel Stowe Botanical Garden, Belmont, North Carolina (photo: Jeff Stevens)
2. Seeds, Madison, Georgia (photo: Jeff Stevens)
3. Close-up of inflorescence (photo: Jeff Stevens)
4. In habitat in Pamlico County, North
Carolina (photo: Gary
Hollar) |
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Sabal sp. 'Birmingham'
BIRMINGHAM PALMETTO
Hardiness: To around 0°F. An established plant in Oklahoma survived subzero
temperatures in 1996. It may turn out to be the world's most cold-hardy
trunking palm.
Description: Grows as a large shrub and forms
a trunk after many years, though not as tall as Sabal palmetto.
Origin: Of mysterious provenance and perhaps a hybrid, the
lone parent tree grew for many years in Birmingham, Alabama.
1. New Bern, North Carolina
(photo: Gary Hollar)
2. Mt. Olive, Alabama
(photo: Ray Adams)
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Trachycarpus fortunei
WINDMILL PALM
Hardiness: Zone 7b (5°F) and in Zone 7a (0°F) with protection. Unhappy in
Zone 9 and hotter in the Southeast.
Description:
An fast and easy-to-grow palm tree reaching 20 feet or so in the
Southeast. The slender trunk is
covered with a burlap-like fiber. Grows well even in clay. Grown in sun in
Zone 7 and give it some shade in Zone 8, protect from strong winds.
Origin: East Asia.
Related species: The Kumaon palm (Trachycarpus takil)
is a related species with similar appearance and hardiness. Wagner's
windmill palm (Trachycarpus wagnerianus) has smaller, stiffer
leaves and is slower growing. The dwarf windmill palm (Trachycarpus
nanus) is a dwarf, nearly groundcover-sized palm.
1. Pullen Park, Raleigh, North Carolina (photo:
Gary Hollar)
2. In full bloom
(photo: George Weaver)
3. Closer view of inflorescence
(photo: Jeff Stevens)
4. Ripe seeds
(photo: Tom McClendon)
5. Fiber-covered trunk
(photo: Jeff Stevens) |
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Sabal palmetto
PALMETTO OR CABBAGE PALM
Hardiness: Zone 8a (10°F), Zone 7b (5°F) with
protection or good siting.
A
common Southeastern palm tree maturing at 40 feet or more, and the symbol
of the Sea Island landscape. Mature specimens are often planted "hurricane
cut" with leaves and most roots removed, actually ensuring better recovery
at its new site. The state tree of both South Carolina and Florida.
Origin: North Carolina to
Florida.
1. Fripp Island, South Carolina
(photo: Joe LeVert)
2. After a rare snowfall at Emerald Beach, North Carolina
(photo: Barry Brindle)
3. Charleston, South Carolina
(photo: Jeff Stevens) |
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Butia capitata
JELLY PALM OR PINDO PALM
Hardiness: Zone 8 (10°F) with some damage occurring
at about 15°F. Needs protection in Zone 7b when temperatures drop below
15°F.
Description: Lovely palm tree with
silvery-green feathery fronds, a stout trunk. Beautiful blossoms and tasty
and aromatic orange fruit are bonuses. Grows
from 20 to 30 feet tall. Looks best in full sun.
Origin: Southern Brazil and Uruguay.
Other species: There are around seven other
species of Butia palms, all native to South America. The wooly palm
(Butia eriospatha) is very similar to the jelly palm and is perhaps
slightly hardier.
1. Raleigh, North Carolina
(photo: Gary Hollar)
2. Aquinas High School, Augusta, Georgia
(photo: Jeff Stevens)
3. Brunswick, Georgia
(photo: Will Fell)
4. Ripe fruit
(photo: Jeff Stevens)
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Serenoa repens
SAW PALMETTO
Hardiness: Zone 8 (10°F) with damage occurring at 10°F to 15°F. Should be
tried more in Zone 7b.
Description: Shrubby
palm to 5 to 10 feet, occasionally forming a trunk. Typical plants have
green leaves, but blue, silver and white forms are highly prized.
Origin: South Carolina to Florida
to Louisiana.
1. Green form in Bullock County, Georgia
(photo: Will Fell)
2. Silver form at Riverbanks Zoo and Botanical
Garden, Columbia, South Carolina
(photo: Jeff Stevens)
3. Seeds in Emmanuel County, Georgia
(photo: Jeff Stevens)
4. Trunked form in Camden County, Georgia
(photo: Tom McClendon) |
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Chamaerops humilis
MEDITERRANEAN FAN PALM
Hardiness: Reliably hardy in Zone 8 (10°F); marginally hardy to 5°F in Zone 7b if given some protection.
Description: A clustering fan palm with stiff
leaves and spiny leaf stems. Grows to five or six feet tall, though along
the Georgia coast specimens 15 feet tall are known. Appreciates good
drainage and full sun. Drought tolerant.
Origin: The shores of the western
Mediterranean. The only palm native to Europe.
1. Bamboo Farm and Coastal Gardens, Savannah,
Georgia (photo: Jeff
Stevens)
2. An example of good siting for Zone 7 in Winston-Salem,
North Carolina (photo:
Bob Snyder)
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Washingtonia filifera
CALIFORNIA FAN PALM
Hardiness: Zone 8b (15°F), Zone 8a (10°F) with
careful siting.
Description: A
massive palm with a thick trunk and heavy crown, growing quickly to 40 feet in the
Southeast.
Origin: California,
Arizona and Baja California.
1.
Charleston, South Carolina
(photo: Jeff Stevens)
2. Bamboo Farm and Coastal Gardens, Savannah,
Georgia (photo: Jeff
Stevens)
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Washingtonia robusta
MEXICAN FAN
PALM
Hardiness: Zone 9 (20°F), Zone 8b (15°F) with
leaf damage.
Description: A easy-to-grow palm where it is
hardy, growing even faster than the California fan palm. Occasionally
grown in Zones 8a and 7 with defoliation and protection since the leaves
resprout so quickly, often growing a full crown by the end of May.
Origin: Western Mexico.
1. Carolina Beach, North Carolina
(photo: Carl Cornelius)
2. Grown as a "perennial" in Chattanooga,
Tennessee (photo: David
Cox)
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©1998–2009
Southeastern
Palm SocietyTM
All
Rights
Reserved. Content provided
by members of the Southeastern Palm Society.
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