Hardiness zone guide
Plants for Zone 9
Winter lows of 20°F to 30°F set the rules here — nearly year-round growing — heat tolerance matters more than cold. Every plant below is proven hardy in Zone 9 and ranked by how many Sow gardeners actually grow it.
Most-saved Zone 9 plants
#1 most savedCheyenne Spirit Coneflower
Echinacea purpurea 'Cheyenne Spirit'
#2 most savedButterfly Weed
Asclepias tuberosa
#3 most savedMay Night Sage
Salvia nemorosa 'May Night'
Pink Muhly Grass
Muhlenbergia capillaris
Incrediball Hydrangea
Hydrangea arborescens 'Incrediball'
American Gold Rush Black-eyed Susan
Rudbeckia hirta 'American Gold Rush'
Pugster Amethyst Butterfly Bush
Buddleja davidii 'Pugster Amethyst'
Old Farmyard Hollyhock
Alcea rosea 'Old Farmyard'
Zinnia Raggedy Ann
Zinnia elegans 'Raggedy Ann'
Butterfly Milkweed
Asclepias x hybrida
Mixed Border Blanket Flower
Gaillardia x grandiflora 'Mixed Border'
Hello Yellow Butterfly Weed
Asclepias tuberosa 'Hello Yellow'
Prairie Phlox
Phlox pilosa
Gay Butterflies Mix Butterfly Weed
Asclepias tuberosa 'Gay Butterflies Mix'
Butterfly Weed Gay Butterflies Milkweed
Asclepias tuberosa 'Gay Butterflies'
Limelight Hydrangea
Hydrangea paniculata 'Limelight'
Common Milkweed
Asclepias syriaca
Green Velvet Boxwood
Buxus sempervirens 'Green Velvet'
Goldsturm Black-eyed Susan
Rudbeckia fulgida 'Goldsturm'
Cinderella Milkweed
Asclepias incarnata 'Cinderella'
Karl Foerster Feather Reed Grass
Calamagrostis x hybrida 'Karl Foerster'
Coral Honeysuckle
Lonicera sempervirens 'Coral Honeysuckle'
Trio Butterfly Bush
Buddleja davidii 'Trio'
Wild Lupine
Lupinus perennis
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Zone 9 questions
What does USDA Zone 9 mean?
Zone 9 averages winter minimums of 20°F to 30°F. A plant rated for Zone 9 survives those lows in the ground — nearly year-round growing — heat tolerance matters more than cold.
When is the last frost in Zone 9?
Frost is late February in Zone 9 — most years pass without a killing freeze, so planting is nearly year-round.
How many plants grow in Zone 9?
9,205 plants in the Sow catalog are hardy in Zone 9, from groundcovers to shade trees. The picks above are ranked by real gardeners, not editorial guesswork.
Keep exploring
Garden smarter in Zone 9
Sow knows your zone, tracks your real weather, and tells you what to plant, prune, and protect — week by week.