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 savedPink Muhly Grass
Muhlenbergia capillaris
May Night Sage
Salvia nemorosa 'May Night'
Incrediball Hydrangea
Hydrangea arborescens 'Incrediball'
Hello Yellow Butterfly Weed
Asclepias tuberosa 'Hello Yellow'
Old Farmyard Hollyhock
Alcea rosea 'Old Farmyard'
Butterfly Weed Gay Butterflies Milkweed
Asclepias tuberosa 'Gay Butterflies'
Gay Butterflies Mix Butterfly Weed
Asclepias tuberosa 'Gay Butterflies Mix'
Butterfly Milkweed
Asclepias x hybrida
American Gold Rush Black-eyed Susan
Rudbeckia hirta 'American Gold Rush'
Pugster Amethyst Butterfly Bush
Buddleja davidii 'Pugster Amethyst'
Mixed Border Blanket Flower
Gaillardia x grandiflora 'Mixed Border'
Zinnia Raggedy Ann
Zinnia elegans 'Raggedy Ann'
Prairie Phlox
Phlox pilosa
Cinderella Milkweed
Asclepias incarnata 'Cinderella'
Common Milkweed
Asclepias syriaca
Goldsturm Black-eyed Susan
Rudbeckia fulgida 'Goldsturm'
Wild Lupine
Lupinus perennis
Trio Butterfly Bush
Buddleja davidii 'Trio'
Coral Honeysuckle
Lonicera sempervirens 'Coral Honeysuckle'
Dahlia
Dahlia variabilis
Beardtongue Rondo
Penstemon barbatus 'Rondo'
Purple Coneflower
Echinacea purpurea
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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?
7,822 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.