African marigold
Tagetes erecta
Zones 2-
11
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 | 1851 total plants
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Alcock's spruce
Picea alcoquiana 'Howell's Tigertail'
Zones 3-
7
Alcock's spruce
Picea bicolor 'Howell's Dwarf'
Zones 3-
7
Alder buckthorn
Frangula alnus 'Ron Williams'
Zones 3-
7
Alder buckthorn
Frangula alnus 'Asplenifolia'
Zones 2-
7
Alder buckthorn
Frangula alnus 'Columnaris'
Zones 3-
7
Alder-leaved serviceberry
Amelanchier alnifolia 'Regent'
Zones 2-
7
Allegheny monkey flower
Mimulus ringens
Zones 3-
8
Alpine currant
Ribes alpinum 'Green Mound'
Zones 2-
7
Alpine currant
Ribes alpinum
Zones 2-
7
Alps yarrow
Achillea distans
Zones 3-
8
Alum root
Heuchera richardsonii
Zones 3-
9
American arborvitae
Thuja occidentalis 'Ericoides'
Zones 2-
7
American arborvitae
Thuja occidentalis 'Dorsett Yellow'
Zones 3-
7
American arborvitae
Thuja occidentalis 'Golden Globe'
Zones 2-
8
American arborvitae
Thuja occidentalis 'Filiformis'
Zones 2-
7
American arborvitae
Thuja occidentalis 'Degroot's Spire'
Zones 2-
7
American arborvitae
Thuja occidentalis 'Lutea'
Zones 2-
8
American arborvitae
Thuja occidentalis 'Hetz Midget'
Zones 2-
7
American arborvitae
Thuja occidentalis 'Nigra'
Zones 3-
7
American arborvitae
Thuja occidentalis 'Sherwood Frost'
Zones 2-
7
American arborvitae
Thuja occidentalis 'Rheingold'
Zones 2-
7
American arborvitae
Thuja occidentalis 'Smaragd'
Zones 2-
7
American arborvitae
Thuja occidentalis 'Techny'
Zones 2-
8
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See All PlantsBest Plants for Zone 3
USDA Hardiness Zone 3 experiences winter minimum temperatures between -40 to -30°F. This collection includes 1851 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.