If you want your trees, shrubs, and perennials to survive and grow year after year, the plant must tolerate year-round conditions in your particular area (low and high temperatures) and the amount and distribution of rainfall.

Listed below are examples of the coldest Zone in which specific plants will survive. In this list, only the coldest Zone is considered; some of the plants listed will not thrive in substantially warmer areas. Always check with the source of your plants for information on whether they are well suited to your area.

Zone 1: Below -50 degrees F

Betula glandulosa (Dwarf birch)
Empetrum nigrum (Crowberry)
Populus fremuloides (Quaking aspen)
Potentilla pensylvanica (Pennsylvania cinquefoil)
Rhododendron lapponicum (Lapland rhododendron)
Salix reticulata (Netleaf willow)

Zone 2: -50 to -40 degrees F

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 3: -40 to -30 degrees F

Berberis thunbergii (Japanese bayberry)
Elaeagnus angustifolia (Russian olive)
Junipercus communis (Common juniper)
Lonicera tatarica (Tatarian honeysuckle)
Malus baccata (Siberian crabapple)
Thuia occidentalis (American arborvitae)

Zone 4: -30 to -20 degrees F

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 5: -20 to -10 degrees F

Cornus florida (Flowering dogwood)
Deutzia gracilis (Slender deutzia)
Ligustrum vulgare (Common privet)
Parthenocissus tricuspidata (Boston ivy)
Rosa multiflora (Japanese rose)
Taxus cuspidata (Japanese yew)

Zone 6: -10 to 0 degrees F

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 7: 0 to 10 degrees F

Acer macrophyllum (Bigleaf maple)
Rhododendron Kurume hybrids (Kurume azalea)
Cedrus atlantica (Atlas cedar)
Cotoneaster microphylla (Small-leaf cotoneaster)
Ilex aquifolium (English holly)
Taxus baccata (English yew)

Zone 8: 10 to 20 degrees F

Arbutus unedo (Strawberry tree)
Choisya temata (Mexican orange)
Olearia haastii (New Zealand daisy-bush)
Pittosporum tobira (Japanese pittosporum)
Prunus laurocerasus (Cherry-laurel)
Viburnum tinus (Laurustinus)

Zone 9: 20 to 30 degrees F

Asparagus setaceous (Asparagus fern)
Eucalyptus globulus (Tasmanian blue gum)
Syzygium paniculatum (Australian bush cherry)
Fuchsia hybrids (Fuchsia)
Grevillea robusta (Silk-oak)
Schinus molle (California pepper tree)

Zone 10: 30 to 40 degrees F

Bougainvillea spectabilis (Bougainvillea)
Cassia fistula (Golden shower)
Eucalyptus citriodora Lemon eucalyptus)
Ficus elastica (Rubber plant)
Ensete ventricosum (Ensete)
Roystonea regia (Royal palm)

Source  Source

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