Follow ing are names of representative persistent plants listed under the 

 coldest zones in which they will normally succeed. Such plants may 

 serve as useful indicators of the cultural possibilities of each zone. 



ZONE 1 

 (below -50° F.) 



Betula glandulosa 

 Empetrum nigrum 

 Populus tremuloides 

 Potentilla pensrhanica 

 Rhododendron lapponicum 

 Salix reticulata 



Dwarf birch 

 Crowberry 

 Quaking aspen 

 Pennsylvania cinquefoil 

 Lapland rhododendron 

 Netleaf willow 



ZONE 2 



(-50° to -40° F. 



Betula papyrifera 

 Cornus canadensis 

 Llaeagnus commutata 

 Juniperus communis 

 Picea glauca 

 Potentilla fruticosa 



Paper birch 

 Bunchberry dogwood 

 Silverberry 

 Common juniper 

 White spruce 

 Bush cinquefoil 



ZONE 3 



(_40° to -30° F.) 



Elaeagnus angustifolia Russian olive 



Lonicera tatarica Tatarian honeysuckle 



Malus baccata Siberian crabapple 



Parthenocissus quinquefolia Virginia creeper 



Syringa vulgaris Common lilac 



Thuja occidentalis American arbor- vitae 



ZONE 4 



(-30° to -20° F. 



Berberis thunbergi 

 Hydrangea paniculata 

 Juniperus chinensis 

 Ligustrum amurense 

 Spiraea vanhouttei 

 Taxus cuspidata 



Japanese barberry 

 Panicle hydrangea 

 Chinese juniper 

 Amur River privet 

 Vanhoutte spirea 

 Japanese yew 



ZONE 5 Cornus florida 



(-20° to -10° F.) Deutzia gracilis 



Forsythia ovata 

 Ligustrum lulgare 

 Parthenocissus tricuspidata 

 Rosa multiflora 



Flowering dogwood 

 Slender deutzia 

 Early forsythia 

 Common privet 

 Boston ivy 

 Japanese rose 



