Before shopping for plants based on your USDA Plant Hardiness Zone, please read our in-depth article about Plant Hardiness Zone Maps to understand their uses and their limitations.
Use the official USDA Hardiness Zone Map to determine your zone by zip code.
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Oenothera fruticosa 'Fireworks'
Item #: 8719
Zones: 3a to 9b
Dormancy: Winter
Height: 20" tall
Culture: Sun to Part Sun
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $20.00Regular priceUnit price per -
Selaginella uncinata
Item #: 1451
Zones: 6a to 10b
Dormancy: Evergreen
Height: 6" tall
Culture: Part Sun to Light Shade
Origin: China
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $23.00Regular priceUnit price per -
Hosta 'Rainbow's End'
Item #: 6035
Zones: 3a to 8b
Dormancy: Winter
Height: 4" tall
Culture: Light Shade
Origin: Hybrid
Pot Size: 2 qt. (1.9 L)
Regular price $29.00Regular priceUnit price per -
Hosta 'Touch of Class'
Item #: 4625
Zones: 3a to 8b
Dormancy: Winter
Height: 12" tall
Culture: Light Shade
Origin: Hybrid
Pot Size: 2 qt. (1.9 L)
Regular price $25.60Regular priceUnit price per$32.00Sale price $25.60Sale -
Sold outAgapanthus 'Navy Blue'
Item #: 12996
Zones: 6a to 10b
Dormancy: Winter
Height: 48" tall
Culture: Sun to Part Sun
Origin: Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $28.00Regular priceUnit price per -
Helleborus x hybridus 'Tropical Sunset'
Item #: 14369
Zones: 4a to 8b
Dormancy: Evergreen
Height: 15" tall
Culture: Part Sun to Light Shade
Origin: Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $25.60Regular priceUnit price per$32.00Sale price $25.60Sale -
Sold outSyneilesis aconitifolia
Item #: 3400
Zones: 3a to 8b, at least
Dormancy: Winter
Height: 18" tall
Culture: Part Sun to Light Shade
Origin: China, Japan, Korea
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $27.00Regular priceUnit price per
Next crop available: 08/14/2026Sold out -
Dryopteris erythrosora 'Brilliance'
Item #: 5293
Zones: 5a to 9b
Dormancy: Evergreen
Height: 24" tall
Culture: Part Sun to Light Shade
Origin: Eastern Asia
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $22.00Regular priceUnit price per -
Sisyrinchium angustifolium 'Lucerne'
Item #: 4782
Zones: 5a to 7b
Dormancy: Evergreen
Height: 8" tall
Culture: Sun to Part Sun
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $21.00Regular priceUnit price per -
Linum lewisii
Item #: 14202
Zones: 4a to 9b
Dormancy: Winter
Height: 24" tall
Culture: Sun
Origin: Canada, Mexico, United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $16.80Regular priceUnit price per$21.00Sale price $16.80
Sale -
Asclepias purpurascens
Item #: 12659
Zones: 3a to 9b
Dormancy: Winter
Height: 24" tall
Culture: Sun
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $24.00Regular priceUnit price per -
Campanula 'Sarastro'
Item #: 5547
Zones: 3a to 8b
Dormancy: Winter
Height: 18" tall
Culture: Sun to Light Shade
Origin: Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $16.80Regular priceUnit price per$21.00Sale price $16.80
Sale -
Euphorbia myrsinites
Item #: 4041
Zones: 5a to 8b, at least
Dormancy: Evergreen
Height: 6" tall
Culture: Sun
Origin: Southern Europe
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $21.00Regular priceUnit price per -
Baptisia 'Cherry Pie'
Item #: 3950
Zones: 4a to 9b
Dormancy: Winter
Height: 32" tall
Culture: Sun
Origin: United States Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $20.00Regular priceUnit price per$25.00Sale price $20.00
Sale -
Helleborus x hybridus 'Flower Girl'
Item #: 13354
Zones: 4a to 8b
Dormancy: Evergreen
Height: 18" tall
Culture: Part Sun to Light Shade
Origin: Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $23.20Regular priceUnit price per$29.00Sale price $23.20Sale -
Sold outAster mongolicus 'Hortensis'
Item #: 1219
Zones: 6a to 9b
Dormancy: Winter
Height: 20" tall
Culture: Sun to Part Sun
Origin: Asia
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $23.00Regular priceUnit price per -
Baptisia australis
Item #: 1182
Zones: 4a to 9b
Dormancy: Winter
Height: 36" tall
Culture: Sun to Part Sun
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $23.00Regular priceUnit price per -
Sarracenia 'Dixie Lace'
Item #: 3060
Zones: 5a to 9b
Dormancy: Winter
Height: 12" tall
Culture: Sun to Part Sun
Origin: United States Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $30.00Regular priceUnit price per -
Belamcanda chinensis 'Hello Yellow'
Item #: 867
Zones: 5a to 9b
Dormancy: Winter
Height: 20" tall
Culture: Sun to Part Sun
Origin: Japan
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $22.00Regular priceUnit price per -
Achillea 'Sassy Summer Lemon' PP 31,693
Item #: 13577
Zones: 5a to 8b, possibly much colder
Dormancy: Winter
Height: 28" tall
Culture: Sun
Origin: Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $20.00Regular priceUnit price per -
Aconitum carmichaelii 'Autumn Indigo'
Item #: 6999
Zones: 3a to 8b
Dormancy: Winter
Height: 60" tall
Culture: Sun to Light Shade
Origin: China
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $19.20Regular priceUnit price per$24.00Sale price $19.20Sale -
Ajuga reptans 'Black Scallop'
Item #: 13515
Zones: 3a to 8b, at least
Dormancy: Evergreen
Height: 3" tall
Culture: Part Sun to Light Shade
Origin: Europe
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $19.00Regular priceUnit price per -
Pulmonaria 'Diana Clare'
Item #: 10352
Zones: 3a to 8b
Dormancy: Evergreen
Height: 10" tall
Culture: Part Sun to Light Shade
Origin: Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $21.00Regular priceUnit price per -
Digitalis thapsi 'Spanish Peaks'
Item #: 16658
Zones: 4a to 8b
Dormancy: Evergreen
Height: 24" tall
Culture: Sun to Part Sun
Origin: Portugal, Spain
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $20.00Regular priceUnit price per
More Information About Plants for Zone 6
Zone 6a and Zone 6b Plants
Many of the perennial plants in our catalog are well-suited for Zones 6a or 6b. Some of our favorite species of acanthus, achillea, agapanthus, agastache, baptisia, brunnera, buddleia, carex, chrysanthemum, coreopsis, delosperma, dentaria, dianthus, echinacea, epimedium, euphorbia, geranium, heuchera, hosta, kniphofia, lilium, lycoris, monarda, paeonia, phlox, polygonatum, podophyllum, rohdea, salvia, solidago and more can survive Zone 4 winter temperatures. Be sure to read how we assign hardiness zones to our plants.
The USDA Plant Hardiness Zone Map is based on the average annual minimum winter temperature, divided into 10-degree F zones. Each zone is then subdivided into 5-degree F sub-zones. Zone numbers increase as you move from north to south.
Zone 6a annual minimum winter temperatures should be -10 to -5 °F (-23.3 to -20.6 °C). Zone 6b annual minimum temperatures should be -5 to 0 °F (-20.6 to -17.8 °C). Keep in mind that the zone designation does not tell you how many days the area may reach those average minimums. There can also be a major difference between what plants will grow in the 'a' or 'b' sub-zones.