Rocky Mountain iris
Iris missouriensis
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium to wet
3
USDA Hardiness Zone 3
-40 to -30°F • Extremely cold winter climates
Includes sub-zones: 3a, 3b|Ideal for: cold-hardy perennials, evergreens, conifers|1850 total plants
Zone 3 quick answer
What grows in USDA Zone 3?
Plants rated for Zone 3 are expected to tolerate average annual extreme winter lows in the -40 to -30°F range. This collection contains 1850 matching plant profiles, including cold-hardy perennials, evergreens, conifers.
A zone rating is only the first check. Compare sun, soil, moisture, summer heat, wind, and your garden's microclimate before choosing a plant.
Narrow the Zone 3 list for your garden
Browse all 1850 plants for this zone with advanced filtering options. Search by plant type, sun exposure, water needs, and more.
Explore All Plants
Rocky Mountain juniper
Juniperus scopulorum 'Wichita Blue'
- USDA zones
- 3–7
- Light
- Full sun
- Water
- Medium
Romanesco broccoli / cauliflower
Brassica oleracea (Botrytis Group)
- USDA zones
- 2–11
- Light
- Full sun
- Water
- Medium
Rose moss
Portulaca grandiflora
- USDA zones
- 2–11
- Light
- Full sun
- Water
- Dry to medium
Rose peashrub
Caragana rosea
- USDA zones
- 3–8
- Light
- Full sun
- Water
- Dry to medium
Rosebay rhododendron
Rhododendron maximum
- USDA zones
- 3–7
- Light
- Part shade to full shade
- Water
- Medium
Roseshell azalea
Rhododendron prinophyllum
- USDA zones
- 3–8
- Light
- Part shade
- Water
- Medium
Rough meadow grass
Poa trivialis
- USDA zones
- 3–7
- Light
- Part shade
- Water
- Medium to wet
Round-leaved ragwort
Packera obovata
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium to wet
Royal fern
Osmunda regalis
- USDA zones
- 3–9
- Light
- Part shade to full shade
- Water
- Medium to wet
Royal fern
Osmunda regalis var. Spectabilis
- USDA zones
- 3–9
- Light
- Part shade to full shade
- Water
- Medium to wet
Rugosa rose
Rosa rugosa
- USDA zones
- 2–7
- Light
- Full sun
- Water
- Medium
Rupture-wort
Herniaria hirsuta
- USDA zones
- 2–9
- Light
- Full sun
- Water
- Medium
Rush
Juncus tenuis
- USDA zones
- 2–9
- Light
- Full sun to part shade
- Water
- Medium to wet
Rush
Juncus 'Blue Dart'
- USDA zones
- 2–9
- Light
- Full sun to part shade
- Water
- Medium to wet
Russian arbor-vitae
Microbiota decussata
- USDA zones
- 3–7
- Light
- Full sun to part shade
- Water
- Medium
Russian arborvitae
Microbiota decussata 'Prides' CELTIC PRIDE
- USDA zones
- 2–7
- Light
- Full sun to part shade
- Water
- Medium
Russian olive
Elaeagnus angustifolia
- USDA zones
- 3–7
- Light
- Full sun to part shade
- Water
- Dry to medium
Russian stonecrop
Phedimus kamtschaticus
- USDA zones
- 3–8
- Light
- Full sun
- Water
- Dry to medium
Sage
Salvia 'Pink Dawn'
- USDA zones
- 3–8
- Light
- Full sun
- Water
- Dry to medium
Saussurea
Saussurea pulchella
- USDA zones
- 3–7
- Light
- Full sun to part shade
- Water
- Medium
Savin juniper
Juniperus sabina 'Mini Arcade'
- USDA zones
- 3–7
- Light
- Full sun
- Water
- Medium
Savin juniper
Juniperus sabina 'Monard' MOOR-DENSE
- USDA zones
- 3–7
- Light
- Full sun
- Water
- Medium
Savin juniper
Juniperus sabina 'Skandia'
- USDA zones
- 3–7
- Light
- Full sun
- Water
- Medium
Savin juniper
Juniperus sabina
- USDA zones
- 3–7
- Light
- Full sun
- Water
- Medium
Scallion
Allium fistulosum 'Evergreen'
- USDA zones
- 3–9
- Light
- Full sun
- Water
- Medium
Scilla
Scilla bifolia 'Rosea'
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium
Scilla
Scilla bifolia
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium
Scotch pine
Pinus sylvestris 'Albyn Prostrata'
- USDA zones
- 3–7
- Light
- Full sun
- Water
- Medium
Scotch pine
Pinus sylvestris 'Beuvronensis'
- USDA zones
- 3–7
- Light
- Full sun
- Water
- Medium
Scotch pine
Pinus sylvestris 'Fastigiata'
- USDA zones
- 3–7
- Light
- Full sun
- Water
- Medium
Scotch pine
Pinus sylvestris 'Glauca Nana'
- USDA zones
- 3–7
- Light
- Full sun
- Water
- Medium
Scotch pine
Pinus sylvestris 'Hillside Creeper'
- USDA zones
- 2–8
- Light
- Full sun
- Water
- Medium
Scotch pine
Pinus sylvestris 'Hindu-Pan'
- USDA zones
- 3–7
- Light
- Full sun
- Water
- Medium
Scotch pine
Pinus sylvestris 'Nana Compressa'
- USDA zones
- 3–7
- Light
- Full sun
- Water
- Medium
Scotch pine
Pinus sylvestris 'Repens'
- USDA zones
- 3–7
- Light
- Full sun
- Water
- Medium
Scotch pine
Pinus sylvestris 'Watereri'
- USDA zones
- 3–7
- Light
- Full sun
- Water
- Dry to medium
Scotch pine
Pinus sylvestris 'Loose Park'
- USDA zones
- 3–7
- Light
- Full sun
- Water
- Medium
Scotch pine
Pinus sylvestris 'Gold Coin'
- USDA zones
- 3–7
- Light
- Full sun
- Water
- Medium
Scotch pine
Pinus sylvestris
- USDA zones
- 2–7
- Light
- Full sun
- Water
- Medium
Sea buckthorn
Hippophae rhamnoides
- USDA zones
- 3–8
- Light
- Full sun
- Water
- Medium
Sea lavender
Goniolimon incanum 'Blue Diamond'
- USDA zones
- 3–9
- Light
- Full sun
- Water
- Dry to medium
Sea lavender
Limonium platyphyllum
- USDA zones
- 3–9
- Light
- Full sun
- Water
- Medium
Sedge
Carex pensylvanica
- USDA zones
- 3–8
- Light
- Part shade to full shade
- Water
- Dry to medium
Sedge
Carex pensylvanica 'Straw Hat'
- USDA zones
- 3–8
- Light
- Part shade to full shade
- Water
- Dry to medium
Serbian bellflower
Campanula poscharskyana 'Stella'
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium
Serbian bellflower
Campanula poscharskyana
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium
Showy milkweed
Asclepias speciosa
- USDA zones
- 3–9
- Light
- Full sun
- Water
- Dry to medium
Showy stonecrop
Hylotelephium spectabile 'Meteor'
- USDA zones
- 3–9
- Light
- Full sun
- Water
- Dry to medium
Showy stonecrop
Hylotelephium spectabile 'Stardust'
- USDA zones
- 3–9
- Light
- Full sun
- Water
- Dry to medium
Shrub rose
Rosa glauca
- USDA zones
- 2–8
- Light
- Full sun
- Water
- Medium
Shrubby cinquefoil
Potentilla fruticosa 'Abbotswood'
- USDA zones
- 3–7
- Light
- Full sun to part shade
- Water
- Medium
Shrubby cinquefoil
Potentilla fruticosa 'Hallman Dwarf'
- USDA zones
- 3–7
- Light
- Full sun to part shade
- Water
- Medium
Shrubby cinquefoil
Potentilla fruticosa
- USDA zones
- 3–7
- Light
- Full sun to part shade
- Water
- Medium
Shrubby St. John's wort
Hypericum prolificum
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium
Siberian bugloss
Brunnera macrophylla
- USDA zones
- 3–8
- Light
- Part shade
- Water
- Medium
Siberian bugloss
Brunnera macrophylla 'Langtrees'
- USDA zones
- 3–7
- Light
- Part shade
- Water
- Medium
Siberian bugloss
Brunnera macrophylla 'Jack Frost'
- USDA zones
- 3–8
- Light
- Part shade
- Water
- Medium
Siberian bugloss
Brunnera macrophylla 'Dawson's White'
- USDA zones
- 3–8
- Light
- Part shade
- Water
- Medium
Siberian bugloss
Brunnera macrophylla 'Hadspen Cream'
- USDA zones
- 3–7
- Light
- Part shade
- Water
- Medium
Siberian bugloss
Brunnera macrophylla 'Looking Glass'
- USDA zones
- 3–7
- Light
- Part shade
- Water
- Medium
Siberian bugloss
Brunnera macrophylla 'Mr. Morse'
- USDA zones
- 3–7
- Light
- Part shade
- Water
- Medium
Siberian bugloss
Brunnera macrophylla 'King's Ransom'
- USDA zones
- 3–8
- Light
- Part shade
- Water
- Medium
Siberian bugloss
Brunnera macrophylla 'Sea Heart'
- USDA zones
- 3–9
- Light
- Part shade
- Water
- Medium
Siberian bugloss
Brunnera macrophylla 'Alexander's Great'
- USDA zones
- 3–8
- Light
- Part shade
- Water
- Medium
Siberian crabapple
Malus baccata 'Halward'
- USDA zones
- 2–7
- Light
- Full sun
- Water
- Medium
Siberian crabapple
Malus mandshurica
- USDA zones
- 2–7
- Light
- Full sun
- Water
- Medium
Siberian iris
Iris 'Steve Varner'
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium to wet
Siberian iris
Iris 'Sparkle'
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium to wet
Siberian iris
Iris 'Baby Sister'
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium to wet
Siberian iris
Iris 'Butter and Sugar'
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium to wet
Siberian iris
Iris 'Gull's Wing'
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium to wet
Siberian iris
Iris 'Illini Charm'
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium to wet
Siberian iris
Iris 'Lady Vanessa'
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium to wet
Siberian iris
Iris 'Caesar's Brother'
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium to wet
Siberian iris
Iris 'Pink Haze'
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium to wet
Siberian iris
Iris 'Dance Ballerina Dance'
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium to wet
Siberian iris
Iris 'Orville Fay'
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium to wet
Siberian iris
Iris 'Sally Kerlin'
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium to wet
Siberian larkspur
Delphinium grandiflorum 'Blue Butterfly'
- USDA zones
- 3–7
- Light
- Full sun
- Water
- Medium
Siberian peashrub
Caragana arborescens
- USDA zones
- 2–7
- Light
- Full sun
- Water
- Dry to medium
Siberian squill
Scilla siberica 'Spring Beauty'
- USDA zones
- 2–8
- Light
- Full sun to part shade
- Water
- Medium
Siberian squill
Scilla siberica
- USDA zones
- 2–8
- Light
- Full sun to part shade
- Water
- Medium
Sieber's crocus
Crocus sieberi subsp. Atticus 'Firefly'
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium
Silky lady's mantle
Alchemilla sericata 'Gold Strike'
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium
Silver birch
Betula pendula MAGICAL GLOBE
- USDA zones
- 3–6
- Light
- Full sun to part shade
- Water
- Medium to wet
Silver buffaloberry
Shepherdia argentea
- USDA zones
- 3–9
- Light
- Full sun to part shade
- Water
- Medium
Silver maple
Acer saccharinum
- USDA zones
- 3–9
- Light
- Full sun to part shade
- Water
- Medium to wet
Silver speedwell
Veronica spicata subsp. Incana
- USDA zones
- 3–8
- Light
- Full sun
- Water
- Medium
Silver willow
Salix alba var. Sericea
- USDA zones
- 2–8
- Light
- Full sun to part shade
- Water
- Medium to wet
Single late tulip
Tulipa 'Queen of Night'
- USDA zones
- 3–8
- Light
- Full sun
- Water
- Medium
Skyblue aster
Symphyotrichum oolentangiense
- USDA zones
- 3–8
- Light
- Full sun
- Water
- Dry to medium
Slenderleaf false foxglove
Agalinis tenuifolia
- USDA zones
- 2–11
- Light
- Full sun to part shade
- Water
- Medium
Small globe thistle
Echinops ritro 'Veitch's Blue'
- USDA zones
- 3–8
- Light
- Full sun
- Water
- Dry to medium
Small globe thistle
Echinops ritro
- USDA zones
- 3–8
- Light
- Full sun
- Water
- Dry to medium
Small-cupped daffodil
Narcissus 'After All'
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium
Small-cupped daffodil
Narcissus 'Copper Coin'
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium
Small-cupped daffodil
Narcissus 'Green Pearl'
- USDA zones
- 3–8
- Light
- Full sun to part shade
- Water
- Medium
Small-flowered anemone
Anemone parviflora
- USDA zones
- 3–7
- Light
- Full sun
- Water
- Medium
Smooth aster
Symphyotrichum laeve
- USDA zones
- 3–8
- Light
- Full sun
- Water
- Dry to medium
Want to see more?
View all 1850 plants for Zone 3 with advanced filtering options. Search by plant type, sun exposure, water needs, and more.
See All PlantsBest Plants for Zone 3
USDA Hardiness Zone 3 experiences winter minimum temperatures between-40 to -30°F. This collection includes 1850 plants specifically suited for Zone 3 conditions, including cold-hardy perennials, evergreens, conifers.
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.