Rose of Sharon
Hibiscus syriacus 'America Irene Scott' SUGAR TIP
Zones 5-
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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Rose peashrub
Caragana rosea
Zones 3-
8
Rose spirea
Spiraea douglasii
Zones 5-
8
Rose verbena
Glandularia canadensis
Zones 5-
9
Rose-gold pussy willow
Salix gracilistyla 'Melanostachys'
Zones 5-
7
Rosebay rhododendron
Rhododendron maximum
Zones 3-
7
Rosemary
Salvia rosmarinus 'Madeline Hill'
Zones 6-
10
Roseshell azalea
Rhododendron prinophyllum
Zones 3-
8
Rosinweed
Silphium integrifolium
Zones 4-
8
Rosinweed sunflower
Helianthus silphioides
Zones 5-
9
Rosularia
Rosularia platyphylla
Zones 5-
10
Rosy dipelta
Dipelta floribunda
Zones 5-
7
Rough goldenrod
Solidago rugosa 'Fireworks'
Zones 4-
8
Rough goldenrod
Solidago rugosa
Zones 4-
8
Rough meadow grass
Poa trivialis
Zones 3-
7
Round-headed leek
Allium sphaerocephalon
Zones 4-
8
Round-leaved ragwort
Packera obovata
Zones 3-
8
Royal catchfly
Silene regia
Zones 5-
8
Royal fern
Osmunda regalis 'Purpurascens'
Zones 4-
8
Royal fern
Osmunda regalis 'Cristata'
Zones 4-
8
Royal fern
Osmunda regalis
Zones 3-
9
Royal fern
Osmunda regalis var. Spectabilis
Zones 3-
9
Rubber rabbitbrush
Ericameria nauseosa
Zones 4-
9
Rubus
Rubus henryi var. Bambusarum
Zones 6-
9
Rubykins Korean willow
Salix koriyanagi 'Rubykins'
Zones 5-
7
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Rue
Ruta graveolens
Zones 4-
8
Rue anemone
Thalictrum thalictroides
Zones 4-
8
Rugosa rose
Rosa 'Jacruwhi' WILD SPICE
Zones 5-
8
Rugosa rose
Rosa rugosa
Zones 2-
7
Running serviceberry
Amelanchier stolonifera
Zones 4-
8
Rupture-wort
Herniaria hirsuta
Zones 2-
9
Rush
Juncus decipiens 'Curly-wurly'
Zones 5-
9
Rush
Juncus tenuis
Zones 2-
9
Rush
Juncus inflexus BLUE MOHAWK
Zones 5-
9
Rush
Juncus 'Blue Dart'
Zones 2-
9
Rush
Juncus inflexus
Zones 4-
9
Russian arbor-vitae
Microbiota decussata
Zones 3-
7
Russian arborvitae
Microbiota decussata 'Prides' CELTIC PRIDE
Zones 2-
7
Russian hibiscus
Kitaibelia vitifolia
Zones 5-
8
Russian olive
Elaeagnus angustifolia
Zones 3-
7
Russian oregano
Origanum vulgare subsp. Gracile
Zones 4-
8
Russian sage
Perovskia atriplicifolia 'Little Spire'
Zones 5-
9
Russian sage
Perovskia 'Filigran'
Zones 5-
9
Russian sage
Perovskia 'Longin'
Zones 5-
9
Russian sage
Perovskia atriplicifolia
Zones 5-
9
Russian sage
Perovskia atriplicifolia 'Lisslitt' LACEY BLUE
Zones 5-
9
Russian sage
Perovskia atriplicifolia 'WALPPB' PEEK-A-BLUE
Zones 5-
9
Russian sage
Perovskia atriplicifolia 'Rocketman'
Zones 5-
9
Russian sage
Perovskia atriplicifolia 'CrazyBlue'
Zones 5-
9
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Russian stonecrop
Phedimus kamtschaticus
Zones 3-
8
Rusty blackhaw viburnum
Viburnum 'Royal Guard'
Zones 5-
9
Rusty blackhaw viburnum
Viburnum rufidulum
Zones 5-
9
Rusty foxglove
Digitalis ferruginea 'Gelber Herold'
Zones 4-
8
Rusty foxglove
Digitalis ferruginea
Zones 4-
8
Sacred lotus
Nelumbo nucifera 'Perry's Giant Sunburst'
Zones 4-
10
Sacred lotus
Nelumbo 'Momo Botan'
Zones 4-
10
Sacred lotus
Nelumbo nucifera
Zones 4-
10
Sage
Salvia nemorosa 'Schwellenburg'
Zones 4-
8
Sage
Salvia transsylvanica
Zones 4-
7
Sage
Salvia nemorosa 'Rosenwein' ROSE WINE
Zones 4-
8
Sage
Salvia transsylvanica 'Blue Cloud'
Zones 4-
7
Sage
Salvia nemorosa 'Marcus'
Zones 4-
8
Sage
Salvia nemorosa 'Sensation Rose'
Zones 4-
8
Sage
Salvia nemorosa 'Caradonna'
Zones 4-
8
Sage
Salvia nemorosa 'Pusztaflamme' PLUMOSA
Zones 4-
8
Sage
Salvia RASPBERRY DELIGHT
Zones 6-
9
Sage
Salvia × superba 'Merleau'
Zones 5-
8
Sage
Salvia 'Eveline'
Zones 4-
8
Sage
Salvia 'Ultra Violet'
Zones 6-
9
Sage
Salvia × superba 'Adora Blue'
Zones 4-
8
Sage
Salvia nemorosa 'Lubecca'
Zones 4-
8
Sage
Salvia nemorosa 'New Dimension Blue'
Zones 5-
8
Sage
Salvia nemorosa 'New Dimension Rose'
Zones 5-
8
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Sage
Salvia daghestanica
Zones 5-
8
Sage
Salvia koyamae
Zones 5-
9
Sage
Salvia 'Pink Dawn'
Zones 3-
8
Sage
Salvia nemorosa 'Perfect Profusion'
Zones 4-
8
Sage
Salvia nemorosa 'White Profusion'
Zones 4-
8
Sage-leaf mullein
Phlomis tuberosa
Zones 6-
9
Sakaki
Cleyera japonica
Zones 6-
9
Sakhalin spruce
Picea glehnii 'Yatsubusa'
Zones 4-
7
Sakhalin spruce
Picea glehnii
Zones 4-
7
Sand phlox
Phlox bifida
Zones 4-
8
Sargent cherry
Prunus sargentii 'Columnaris'
Zones 4-
7
Sargent cherry
Prunus sargentii
Zones 4-
7
Sargent crabapple
Malus sargentii 'Tina'
Zones 4-
8
Sargent crabapple
Malus sargentii 'Candymint'
Zones 4-
8
Sargent crabapple
Malus sargentii
Zones 4-
7
Sarsaparilla plant
Smilax hispida
Zones 4-
8
Sassafras
Sassafras albidum
Zones 4-
9
Saucer magnolia
Magnolia × soulangeana
Zones 4-
9
Saucer magnolia
Magnolia × soulangeana 'Alexandrina'
Zones 5-
8
Saucer magnolia
Magnolia × soulangeana 'Lennei'
Zones 4-
9
Saucer magnolia
Magnolia × soulangeana 'Picture'
Zones 4-
9
Saussurea
Saussurea pulchella
Zones 3-
7
Savin juniper
Juniperus sabina 'Monard' MOOR-DENSE
Zones 3-
7
Savin juniper
Juniperus sabina 'Skandia'
Zones 3-
7
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Savin juniper
Juniperus sabina 'Mini Arcade'
Zones 3-
7
Savin juniper
Juniperus sabina
Zones 3-
7
Saw-leaved speedwell
Veronica austriaca subsp. Teucrium 'Royal Blue'
Zones 4-
8
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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.