|
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) |
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) |
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)
Ilex opaca
(American holly)
Ligustrum ovalifolium
(California privet) |
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) |
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) |
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