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USDA Plant Hardiness Zone Map

50 United States

Indicator Plant Examples

Listed by: ZONE

Cold Hardiness Ratings for Selected Woody Plants

Representative plants listed under the coldest zones
in which they normally succeed

Zone Ratings -- Average Annual Minimum Temperature Range

1 & 2    3 & 4    5 & 6    7 & 8    9 & 10

 
Zone
Botanical (and Common) Names
1
Below -50 °F
Below -45.6 °C
  Betula glandulosa  (Dwarf birch)
  Empetrum nigrum  (Crowberry)
  Populus fremuloides  (Quaking aspen)
  Potentilla pensylvanica  (Pennsylvania cinquefoil)
  Rhododendron lapponicum  (Lapland rhododendron)
  Salix reticulate  (Netleaf willow)
2
-50 to -40 °F
-45.6 to -40 °C
  Betula papyrifera  (Paper birch)
  Cornus canadensis  (Bunchberry dogwood)
  Elaeagnus commutata  (Silverberry)
  Larix laricina  (Eastern larch)
  Potentilla fruticosa  (Bush cinquefoil)
  Viburnum trilobum  (American cranberry bush)

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50 States

 
Zone
Botanical (and Common) Names
3
-40 to -30 °F
-40 to -34.5 °C
  Berberis thunbetgii  (Japanese bayberry)
  Elaeagnus angustifolia  (Russian olive)
  Junipercus communes  (Common juniper)
  Lonicera tatarica  (Tatarian honeysuckle)
  Malus baocata  (Siberian crabapple)
  Thuia occidentalis  (American arborvitae)
4
-30 to -20 °F
-43.5 to -28.9 °C
  Acer saccharum  (Sugar maple)
  Hydrangea paniculata  (Panicle hydrangea)
  Juniperus chinensis  (Chinese juniper)
  Ligustrum amurense  (Amur River privet)
  Parthenocissus quinquefolia  (Virginia creeper)
  Spiraea x vanhouttei  (Vanhouffe spirea)

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50 States

 
Zone
Botanical (and Common) Names
5
-20 to -10 °F
-28.9 to -23.3 °C
  Cornus florida  (Flowering dogwood)
  Deutzia gracilis  (Slender deutzia)
  Ligustrum vulgare  (Common privet)
  Paithenocissus tricuspidata  (Boston ivy)
  Rosa multiflora  (Japanese rose)
  Taxus cuspidata  (Japanese yew)
6
-10 to 0 °F
-23.3 to -17.8 °C
  Acer palmatum  (Japanese maple)
  Buxus sempervirens  (Common boxwood)
  Euonymus follunei  (Winter creeper)
  Hedera helix  (English ivy)
  Ilex opaca  (American holly)
  Ligustrum ovalifolium  (California privet)

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50 States

 
Zone
Botanical (and Common) Names
7
0 to 10 °F
-17.8 to -12.3 °C
  Acer macrophylium  (Bigleaf maple)
  Rhododendron Kurume hybrids   (Kurume azalea)
  Cedrus atlantica  (Atlas cedar)
  Cotoneaster microphylla  (Small-leaf cotoneaster)
  Ilex aquifolium  (English holly)
  Taxus baccata  (English yew)
8
10 to 20 °F
-12.3 to -6.6 °C
  Arbutus unedo  (Strawberry tree)
  Choisya temata  (Mexican orange)
  Olearia haastii  (New Zealand daisy-bush)
  Pittosporum tobira  (Japanese pittosporum)
  Prunus laurocerasus  (Cherry-laurel)
  Viburnum tinus  (Laurestinus)

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50 States

 
Zone
Botanical (and Common) Names
9
20 to 30 °F
-6.6 to -1.1 °C
nbsp; Asparagus setacous  (Asparagus fern)
  Eucalyptus globulus  (Tasmanian blue gum)
  Syzygium paniculatum  (Australian bush cherry)
  Fuchsia hybrids  (Fuchsia)
  Grevillea robusta  (Silk-oak)
  Schinus molle  (California pepper tree)
10
30 to 40 °F
-1.1 to 4.4 °C
  Bougainvillea spectabilis  (Bougainvillea)
  Cassia fistula  (Golden shower)
  Eucalyptus citriodora  (Lemon eucalyptus)
  Ficus elastica  (Rubber plant)
  Ensete ventricosum  (Ensete)
  Roystonea regia  (Royal palm)

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50 States




Go to the USDA Hardiness Zone Map





USDA Miscellaneous Publication No. 1475. Issued January 1990
Authored by Henry M. Cathey while Director, U.S. National Arboretum
Edited, formatted and prepared for the US National Arboretum web site by Ramon Jordan, March 1998
U.S. National Arboretum, Agricultural Research Service, U.S. Department of Agriculture,
Washington, DC 20002.

Updated and edited, by Yankee Gardener, February 2001

Back to the USDA Hardiness Zone Map Introduction Page

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