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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Helleborus x ericsmithii 'Joker' PP 22,022
Item #: 9266
Zones: 5a 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 $26.00Regular priceUnit price perNext crop available: 10/04/2024Sold out -
Asclepias tuberosa 'Hello Yellow'
Item #: 6700
Zones: 4a to 9b
Dormancy: Winter
Height: 20" tall
Culture: Sun
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $22.00Regular priceUnit price per -
Geranium 'Rozanne'
Item #: 5111
Zones: 5a to 8b
Dormancy: Winter
Height: 15" tall
Culture: Sun to Part Sun
Origin: Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $21.00Regular priceUnit price per -
Lobelia cardinalis 'Black Truffle' PP 25,687
Item #: 6226
Zones: 3a to 9b
Dormancy: Evergreen
Height: 48" 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 -
Athyrium filix-femina 'Lady in Red'
Item #: 4968
Zones: 3a to 8b
Dormancy: Winter
Height: 20" tall
Culture: Part Sun to Light Shade
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $22.00Regular priceUnit price per -
Sold out
Helleborus x hybridus 'Amber Gem'
Item #: 4467
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 $27.00Regular priceUnit price perNext crop available: 05/31/2024Sold out -
Sold out
Helleborus x hybridus 'Red Sapphire'
Item #: 4045
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 $27.00Regular priceUnit price perNext crop available: 10/04/2024Sold out -
Salvia greggii 'Pink Preference'
Item #: 5042
Zones: 6a to 10b
Dormancy: Evergreen
Height: 24" tall
Culture: Sun to Part Sun
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $22.00Regular priceUnit price per -
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Iris ensata 'Silverband'
Item #: 1349
Zones: 5a to 9b
Dormancy: Winter
Height: 28" tall
Culture: Sun to Part Sun
Origin: Japan
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $27.00Regular priceUnit price perSold out -
Helleborus x hybridus 'Painted Doubles'
Item #: 9747
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 $29.00Regular priceUnit price perNext crop available: 10/18/2024Sold out -
Hibiscus 'Pink Teacups'
Item #: 13011
Zones: 6a to 9b
Dormancy: Winter
Height: 96" tall
Culture: Sun
Origin: United States Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $28.00Regular priceUnit price per -
Hosta 'Blue Ivory' PP 19,623
Item #: 8483
Zones: 3a to 8b
Dormancy: Winter
Height: 16" tall
Culture: Part Sun to Light Shade
Origin: Hybrid
Pot Size: 2 qt. (1.9 L)
Regular price $29.00Regular priceUnit price per -
Delosperma 'Fire Spinner'
Item #: 9675
Zones: 5a to 8b, at least
Dormancy: Evergreen
Height: 2" tall
Culture: Sun
Origin: South Africa
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $20.00Regular priceUnit price per -
Sold out
Echinacea 'Big Kahuna' PP 26,159
Item #: 14337
Zones: 4a to 9b
Dormancy: Winter
Height: 28" tall
Culture: Sun
Origin: United States Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $22.00Regular priceUnit price perNext crop available: 06/07/2024Sold out -
Bletilla striata 'White Pearl'
Item #: 10443
Zones: 6a to 9b
Dormancy: Winter
Height: 30" tall
Culture: Part Sun
Origin: Burma/Myanmar, China, Japan, Korea
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $38.00Regular priceUnit price per -
Helleborus x hybridus 'Maid of Honor'
Item #: 13125
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 $27.00Regular priceUnit price perNext crop available: 10/04/2024Sold out -
Baptisia 'Blue Towers' PP 27,088
Item #: 8338
Zones: 4a to 9b, at least
Dormancy: Winter
Height: 54" tall
Culture: Sun
Origin: United States Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $25.00Regular priceUnit price per -
Asphodeline lutea 'Italian Gold'
Item #: 10450
Zones: 6a to 9b
Dormancy: Summer, Fall
Height: 48" tall
Culture: Sun
Origin: Mediterranean Europe
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $22.00Regular priceUnit price per -
Phlox paniculata 'Thai Pink Jade' PP 22,961
Item #: 13504
Zones: 5a to 9b, at least
Dormancy: Winter
Height: 48" tall
Culture: Sun
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $21.00Regular priceUnit price per -
Hosta 'Cathedral Windows' PP 17,295
Item #: 6600
Zones: 3a to 9b
Dormancy: Winter
Height: 21" tall
Culture: Part Sun to Light Shade
Origin: Hybrid
Pot Size: 3 qt. (2.8 L)
Regular price $30.00Regular priceUnit price per -
Sold out
Dracunculus vulgaris
Item #: 2821
Zones: 5b to 8b
Dormancy: Summer, Fall
Height: 36" tall
Culture: Sun to Light Shade
Origin: Mediterranean Europe
Pot Size: Bare Root / 3.5" pot (24 fl. oz/0.7 L)
Regular price $25.00Regular priceUnit price perSold out -
Sold out
Tiarella 'Pink Skyrocket'
Item #: 5106
Zones: 3a to 8b
Dormancy: Evergreen
Height: 8" tall
Culture: Part Sun to Light Shade
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
Regular price $21.00Regular priceUnit price perNext crop available: 05/31/2024Sold out -
Buddleia lindleyana
Item #: 88
Zones: 5a to 9b
Dormancy: Winter
Height: 72" tall
Culture: Sun
Origin: China
Pot Size: 3 qt. (2.8 L)
Regular price $29.00Regular priceUnit price per -
Laurentia fluviatilis
Item #: 1355
Zones: 5a to 10b
Dormancy: Evergreen
Height: 1" tall
Culture: Sun to Light Shade
Origin: Australia
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 current USDA Plant Hardiness Zone Map was last updated in 2012 and 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.