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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)




 

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)




 

  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)




 

  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)




Zone

Botanical (and Common) Names

9

 

20 to 30 F

-6.6 to -1.1 C
   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)