Results
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| Abelia x 'Mardi Gras' | 6 to 9 |
| Acer buergeranum | 4 to 9 |
| Acer cappadocicum | 5 to 7 |
| Acer palmatum 'Fireglow' | 6 to 8 |
| Acer pennsylvanicum | 3 to 7 |
| Acorus gramineus variegatus | 5 to 10 |
| Aesculus parviflora | 4 to 8 |
| Agapanthus 'Blue Globe' | 7 to 10 |
| Agapanthus 'White Superior' | 7 to 10 |
| Agarista populifolia | 7 to 9 |
| Akebia quinata 'Alba' | 5 to 9 |
| Allium senescens | 4 to 7 |
| Aucuba japonica 'Marmorata' | 7 to 10 |
| Aucuba japonica 'Nana' | 7 to 10 |
| Aucuba japonica 'Rozannie' | 6 to 10 |
| Azalea hybrida 'Johga' | 7 to 9 |
| Azalea x 'Orchid Lights' | 4 to 8 |
| Azalea x 'Summer Eyelet' | 5 to 9 |
| Azalea x 'White Lights' | 4 to 8 |
| Buddleia x 'Miss Ruby' | 5 to 9 |
| Callicarpa americana | 7 to 10 |
| Calycanthus floridus | 4 to 9 |
| Calycanthus x 'Venus' | 5 to 9 |
| Camellia japonica 'CM Hovey' | 6b/7 to 10 |
| Camellia japonica 'Dr. Tinsley' | 6b/7 to 10 |
| Camellia japonica 'Goggy' | 7 to 10 |
| Camellia japonica 'Tomorrow' | 7 to 10 |
| Camellia sasanqua 'Yutetide' | 7 to 10 |
| Camellia vernalis 'Eago' | 6b/7 to 10 |
| Camellia x 'Buttons N Bows' | 7 to 10 |
| Camellia x 'Crimson Candles' | 7 to 10 |
| Camellia x 'Isaribi' | 7a to 10 |
| Camellia x 'Mason Farm' | 6 to 10 |
| Camellia x 'Pink Icicle' | 6 to 10 |
| Camellia x 'Snow Flurry' | 6 to 10 |
| Camellia x 'Winter's Star' | 6 to 10 |
| Carpinus japonica | 5 to 8 |
| Chionanthus retusus | 6 to 8 |
| Chionanthus virginicus | 4 to 9 |
| Cladrastis kentukea | 4 to 8 |
| Cotoneaster franchetti | 6 to 8 |
| Cotoneaster pannosus 'Nana' | 7 to 11 |
| Cotoneaster x 'Hessei' | 5 to 8 |
| Cupressocyparis leylandii | 6 to 10 |
| Cyrtomium falcatum | 6 to 10 |
| Dahlia 'Roxy' | 8 to 10 |
| Danae racemosa | 7 to 9 |
| Daphne odora 'Variegata' | 7 to 9 |
| Deutzia gracilis | 4 to 8 |
| Deutzia gracilis 'Nikko' | 5 to 8 |
| Dryopteris atrata | 6 to 8 |
| Dryopteris erythrosora | 5 to 8 |
| Edgeworthia chrysantha | 7 to 9 |
| Fagus grandiflora | 4 to 9 |
| Fargaria 'Tribute' | 3 to 8 |
| Ficus carica 'Brown Turkey' | 7 to 10 |
| Geranium 'Rozanne' | 5 to 8 |
| Gymnocladus dioicus | 3 to 8 |
| Hamamelis virginiana | 3 to 8 |
| Helleborus orientalis | 4 to 9 |
| Heptacodium miconioides | 5 to 8 |
| Hosta 'Blue Mammoth' | 3 to 8 |
| Hosta 'Golden Tiara' | 3 to 8 |
| Hosta 'Guacamole' | 3 to 8 |
| Hosta 'Minuteman' | 3 to 8 |
| Hosta 'Sagae' | 3 to 8 |
| Hosta 'So Sweet' | 3 to 9 |
| Hosta 'Halcyon' | 3 to 8 |
| Hosta 'Royal Standard' | 3 to 8 |
| Ilex colchica | 7 to 10 |
| Ilex cornuta 'Carissa' | 6 to 9 |
| Ilex crenata 'Compacta' | 6 to 9 |
| Ilex crenata 'Drops of Gold' | 6a to 9 |
| Ilex crenata 'Helleri' | 6 to 9 |
| Ilex latifolia | 7 to 9 |
| Ilex opaca 'Carolina #2' | 6 to 9 |
| Ilex vomitoria 'Schillings' | 7 to 10 |
| Ilex x 'Emily Brunner' | 7 to 9 |
| Ilex x 'Conive' Festive™ | 6 to 10 |
| Ilex x 'Fineline' | 6 to 9 |
| Ilex x 'Conaf' Oakleaf™ | 6 to 10 |
| Ilex x 'Conot' Patriot™ | 6 to 10 |
| Illicium henryi | 7 to 10 |
| Illicium parviflorum | 6 to 9 |
| Iris ensata 'Variegata' | 5 to 9 |
| Jasminium nudiflorum | 6 to 10 |
| Leucothoe axillaris | 5 to 9 |
| Liriope muscari 'Big Blue' | 6 to 10 |
| Magnolia grandiflora 'Alta' | 6 to 10 |
| Magnolia x 'Daybreak' | 5 to 8 |
| Magnolia x 'Genie' | 5 to 9 |
| Magnolia x 'Yellowbird' | 4 to 8 |
| Mahonia bealei | 6 to 9 |
| Mulenbergia capillaris | 6 to 10 |
| Nandina domestica | 6 to 9 |
| Nandina domestica 'Alba' | 6 to 9 |
| Nyssa sylvatica | 4 to 9 |
| Onoclea sensibilis | 4 to 9 |
| Osmanthus x fortunei | 7 to 10 |
| Ostrya virginiana | 3 to 9 |
| Oxydendrum arboreum | 5 to 9 |
| Picea glauca 'Conica' | 2 to 7 |
| Pieris japonica 'Katsura' | 4b to 7 |
| Pinus nigra 'Teardrop' | 3b to 7 |
| Pittosporum tobira | 8 to 10 |
| Pyracantha x 'Mohave' | 6 to 9 |
| Raphiolepis umbellata 'Alba' | 7 to 10 |
| Sarcococca ruscifolia | 7 to 9 |
| Smilax lanceolata | 7 to 9 |
| Stewartia pseudocamellia | 4 to 7 |
| Taxus x media 'Hicksii' | 4 to 7 |
| Taxus x media 'Tautonii' | 4 to 8 |
| Ternstroemia gymnanthera | 7 to 9 |
| Teucrium chamaedrys | 5 to 8 |
| Thuja x 'Green Giant' | 3 to 8 |
| Thuja x 'Steeplechase' | 5 to 9 |
| Ulmus x 'Frontier' | 5 to 8 |
| Vaccinium ashei | 7 to 9 |
| Viburnum carlesii | 4 to 8 |
| Viburnum rhytidophyllum | 5 to 8 |
| Viburnum tinus 'Spirit' | 7 to 10 |
| Viburnum x burkwoodii | 5 to 8 |
| Viburnum x pragense | 5 to 8 |
| Vinca major 'Wojo's Jem' | 7 to 9 |
| Vinca minor 'Bowles' | 4 to 8 |
| Yucca recurvifolia | 7 to 9 |