United States Plant Zones

 

 

Cold Hardiness Ratings for Selected Woody Plants
Representative plants listed under the coldest zones in which they  Zone Ratings - Average Annual Minimum Temperature Range.

Zone: 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)