Blue cohosh
Caulophyllum thalictroides
Zones 3-
8
6
USDA Hardiness Zone 6
-10 to 0°F • Moderate winter climates
Includes sub-zones: 6a, 6b | Ideal for: perennials, shrubs, ornamental trees | 5960 total plants
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Blue elder
Sambucus nigra subsp. Cerulea
Zones 4-
9
Blue false indigo
Baptisia australis
Zones 3-
9
Blue false indigo
Baptisia australis var. Minor
Zones 3-
8
Blue fescue
Festuca glauca 'Elijah Blue'
Zones 4-
8
Blue fescue
Festuca glauca 'Boulder Blue'
Zones 4-
9
Blue fescue
Festuca glauca
Zones 4-
8
Blue fescue
Festuca glauca 'Casca11' BEYOND BLUE
Zones 4-
9
Blue flag
Iris versicolor 'Whodunit'
Zones 3-
7
Blue flag
Iris versicolor
Zones 3-
9
Blue globe thistle
Echinops bannaticus 'Blue Glow'
Zones 3-
8
Blue grama
Bouteloua gracilis
Zones 3-
10
Blue grama
Bouteloua gracilis 'Hachita'
Zones 3-
10
Blue grama
Bouteloua gracilis 'Blonde Ambition'
Zones 3-
10
Blue green sedge
Carex flacca
Zones 4-
9
Blue holly
Ilex × meserveae BLUE PRINCESS
Zones 4-
7
Blue holly
Ilex × meserveae BLUE PRINCE
Zones 4-
7
Blue iris
Iris spuria
Zones 5-
9
Blue jasmine
Clematis crispa
Zones 6-
9
Blue mistflower
Conoclinium coelestinum
Zones 5-
10
Blue moor grass
Sesleria caerulea
Zones 5-
8
Blue oat grass
Helictotrichon sempervirens
Zones 4-
8
Blue sage
Salvia azurea 'Nekan'
Zones 4-
9
Blue sage
Salvia azurea
Zones 5-
9
Blue sage
Salvia azurea var. Grandiflora
Zones 5-
9
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Blue sedge
Carex flacca 'Blue Zinger'
Zones 5-
9
Blue star
Amsonia 'Blue Ice'
Zones 4-
9
Blue star
Amsonia tabernaemontana 'Montana'
Zones 4-
9
Blue star
Amsonia ciliata
Zones 5-
9
Blue star
Amsonia hubrichtii
Zones 5-
8
Blue star
Amsonia tabernaemontana
Zones 3-
9
Blue star
Amsonia tabernaemontana var. Salicifolia
Zones 3-
9
Blue star
Amsonia ciliata var. Filifolia
Zones 5-
9
Blue star
Amsonia ciliata 'Halfway to Arkansas'
Zones 5-
9
Blue star
Amsonia 'Midway to Montana'
Zones 4-
9
Blue star
Amsonia tabernaemontana 'Storm Cloud'
Zones 3-
9
Blue star
Amsonia 'Starstruck'
Zones 4-
9
Blue stem goldenrod
Solidago caesia
Zones 4-
8
Blue waxweed
Cuphea viscosissima
Zones 6-
9
Blue wood sedge
Carex flaccosperma
Zones 5-
8
Blue-eyed grass
Sisyrinchium angustifolium 'Lucerne'
Zones 4-
8
Blue-eyed grass
Sisyrinchium angustifolium
Zones 4-
9
Blue-eyed grass
Sisyrinchium angustifolium SASSY GRASS
Zones 4-
9
Blue-eyed Mary
Collinsia verna
Zones 2-
11
Bluebeard
Caryopteris × clandonensis 'Blue Mist'
Zones 5-
8
Bluebeard
Caryopteris × clandonensis 'Dark Knight'
Zones 5-
9
Bluebeard
Caryopteris × clandonensis 'Worcester Gold'
Zones 5-
9
Bluebeard
Caryopteris × clandonensis 'Longwood Blue'
Zones 5-
9
Bluebeard
Caryopteris divaricata 'Snow Fairy'
Zones 6-
9
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Bluebeard
Caryopteris × clandonensis 'Heavenly Blue'
Zones 5-
9
Bluebeard
Caryopteris × clandonensis 'Arthur Simmonds'
Zones 5-
9
Bluebeard
Caryopteris incana 'Jason' SUNSHINE BLUE
Zones 5-
9
Bluebeard
Caryopteris × clandonensis 'Summer Sorbet'
Zones 5-
8
Bluebeard
Caryopteris × clandonensis 'Minibleu' PETIT BLEU
Zones 5-
9
Bluebeard
Caryopteris × clandonensis 'Lisaura' HINT OF GOLD
Zones 5-
9
Bluebeard
Caryopteris × clandonensis 'Lissilv' STERLING SILVER
Zones 5-
9
Bluebeard
Caryopteris × clandonensis 'Blauer Splatz' SAPPHIRE SURF
Zones 5-
9
Bluebell
Campanula rotundifolia
Zones 3-
6
Blueberry
Vaccinium 'Pink Lemonade'
Zones 4-
9
Blueberry
Vaccinium 'Northblue'
Zones 3-
7
Bluestem
Andropogon capillipes 'Valdosta Blue'
Zones 6-
10
Blunt mountainmint
Pycnanthemum muticum
Zones 4-
8
Blunt-lobed woodsia
Woodsia obtusa subsp. Obtusa
Zones 4-
8
Bog bean
Menyanthes trifoliata
Zones 3-
10
Bog spurge
Euphorbia palustris
Zones 5-
10
Borage
Borago officinalis
Zones 2-
11
Border bearded iris
Iris 'Rielle'
Zones 3-
10
Border carnation
Dianthus 'Pixie'
Zones 3-
8
Border forsythia
Forsythia × intermedia 'Beatrix Farrand'
Zones 5-
8
Border forsythia
Forsythia × intermedia 'Arnold Giant'
Zones 5-
8
Border forsythia
Forsythia × intermedia 'Sunrise'
Zones 5-
8
Border forsythia
Forsythia × intermedia 'Courdijau' GOLDEN PEEP
Zones 5-
8
Border forsythia
Forsythia × intermedia 'Variegata'
Zones 5-
8
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Border forsythia
Forsythia × intermedia 'Flojor' MINIGOLD
Zones 5-
8
Border forsythia
Forsythia × intermedia 'Mindor' SHOW OFF
Zones 5-
8
Border forsythia
Forsythia × intermedia 'Lynwood Variety'
Zones 5-
8
Border forsythia
Forsythia × intermedia 'Kolgold' MAGICAL GOLD
Zones 5-
8
Border privet
Ligustrum obtusifolium
Zones 3-
7
Bosnian pine
Pinus heldreichii
Zones 3-
8
Boston ivy
Parthenocissus tricuspidata 'Lowii'
Zones 3-
9
Boston ivy
Parthenocissus tricuspidata 'Veitchii'
Zones 4-
8
Boston ivy
Parthenocissus tricuspidata 'Fenway Park'
Zones 4-
8
Boston ivy
Parthenocissus tricuspidata
Zones 4-
8
Bottle gourd
Lagenaria siceraria
Zones 2-
11
Bottlebrush buckeye
Aesculus parviflora var. Serotina
Zones 4-
8
Bottlebrush buckeye
Aesculus parviflora var. Serotina 'Rogers'
Zones 4-
8
Bottlebrush buckeye
Aesculus parviflora
Zones 4-
8
Bottlebrush grass
Elymus hystrix
Zones 5-
9
Bourbon rose
Rosa 'Zéphirine Drouhin'
Zones 5-
9
Bowles' golden sedge
Carex elata 'Aurea'
Zones 5-
9
Boxelder
Acer negundo 'Flamingo'
Zones 3-
9
Boxelder
Acer negundo
Zones 2-
10
Boxwood
Buxus microphylla 'Peergold' GOLDEN DREAM
Zones 6-
9
Boxwood
Buxus microphylla 'Apple Green'
Zones 6-
9
Boxwood
Buxus microphylla 'Compacta'
Zones 6-
9
Boxwood
Buxus microphylla 'Curly Locks'
Zones 6-
9
Boxwood
Buxus microphylla 'Green Pillow'
Zones 6-
9
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Boxwood
Buxus microphylla 'John Baldwin'
Zones 6-
9
Boxwood
Buxus sempervirens 'Aurea Pendula'
Zones 6-
9
Boxwood
Buxus sempervirens 'Dee Runk'
Zones 6-
8
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View all 5960 plants for Zone 6 with advanced filtering options. Search by plant type, sun exposure, water needs, and more.
See All PlantsBest Plants for Zone 6
USDA Hardiness Zone 6 experiences winter minimum temperatures between -10 to 0°F. This collection includes 5960 plants specifically suited for Zone 6 conditions, including perennials, shrubs, ornamental trees.
Understanding Your Hardiness Zone
The USDA hardiness zone is based on average annual minimum winter temperature. While it's an excellent starting point, also consider your local microclimate, soil conditions, rainfall patterns, and summer heat when selecting plants.