Hardiness zone guide
Plants for Zone 4
Winter lows of -30°F to -20°F set the rules here — short, intense seasons — plants here are the toughest in the catalog. Every plant below is proven hardy in Zone 4 and ranked by how many Sow gardeners actually grow it.
Most-saved Zone 4 plants
#1 most savedButterfly Weed
Asclepias tuberosa
#2 most savedCheyenne Spirit Coneflower
Echinacea purpurea 'Cheyenne Spirit'
#3 most savedButterfly Weed
Asclepias tuberosa 'Gay Butterflies Mix'
Butterfly Kisses Coneflower
Echinacea purpurea 'Butterfly Kisses'
Butterfly Weed Gay Butterflies Milkweed
Asclepias tuberosa 'Gay Butterflies'
Hello Yellow Butterfly Weed
Asclepias tuberosa 'Hello Yellow'
Garden Phlox
Phlox paniculata 'Mix'
Purple Coneflower Rainbow
Echinacea purpurea 'Rainbow'
Butterfly Milkweed
Asclepias x hybrida
Old Farmyard Hollyhock
Alcea rosea 'Old Farmyard'
May Night Sage
Salvia nemorosa 'May Night'
Walker's Low Catmint
Nepeta faassenii 'Walker's Low'
Black-eyed Susan
Rudbeckia hirta 'American Gold Rush'
Garden Phlox 'Rene Duval'
Phlox paniculata 'Rene Duval'
Blanket Flower
Gaillardia x grandiflora 'Mixed Border'
Incrediball Hydrangea
Hydrangea arborescens 'Incrediball'
Cinderella Milkweed
Asclepias incarnata 'Cinderella'
Prairie Phlox
Phlox pilosa
Cheyenne Spirit Coneflower
Echinacea purpurea 'Cheyenne Spirit Mix'
Black-eyed Susan
Rudbeckia hirta 'Autumn Colors Mix'
Common Milkweed
Asclepias syriaca
Wild Lupine
Lupinus perennis
Purple Coneflower
Echinacea purpurea
Lou Williams New England Aster
Aster novae-angliae 'Lou Williams'
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Zone 4 questions
What does USDA Zone 4 mean?
Zone 4 averages winter minimums of -30°F to -20°F. A plant rated for Zone 4 survives those lows in the ground — short, intense seasons — plants here are the toughest in the catalog.
When is the last frost in Zone 4?
Typically around mid-May, with first fall frost near late September. Local microclimates shift this by a week or two — Sow tracks your actual forecast and warns you before frost nights.
How many plants grow in Zone 4?
6,472 plants in the Sow catalog are hardy in Zone 4, from groundcovers to shade trees. The picks above are ranked by real gardener saves, not editorial guesswork.
Keep exploring
Garden smarter in Zone 4
Sow knows your zone, tracks your real weather, and tells you what to plant, prune, and protect — week by week.
