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.

8,125 hardy plantsWinters: 20°F to 30°FLast frost ≈ late February

Most-saved Zone 9 plants

Cheyenne Spirit Coneflower#1 most saved

Cheyenne Spirit Coneflower

Echinacea purpurea 'Cheyenne Spirit'

Zones 4–9· 1.2k saves· from $13
Butterfly Weed#2 most saved

Butterfly Weed

Asclepias tuberosa

Zones 4–9· 756 saves· from $11
Pink Muhly Grass#3 most saved

Pink Muhly Grass

Muhlenbergia capillaris

Zones 5–10· 512 saves· from $15
May Night Sage

May Night Sage

Salvia nemorosa 'May Night'

Zones 4–9· 501 saves· from $8
Incrediball Hydrangea

Incrediball Hydrangea

Hydrangea arborescens 'Incrediball'

Zones 4–9· 450 saves· from $21
Hello Yellow Butterfly Weed

Hello Yellow Butterfly Weed

Asclepias tuberosa 'Hello Yellow'

Zones 4–9· 431 saves· from $18
Old Farmyard Hollyhock

Old Farmyard Hollyhock

Alcea rosea 'Old Farmyard'

Zones 4–9· 427 saves
Butterfly Weed Gay Butterflies Milkweed

Butterfly Weed Gay Butterflies Milkweed

Asclepias tuberosa 'Gay Butterflies'

Zones 4–9· 424 saves
American Gold Rush Black-eyed Susan

American Gold Rush Black-eyed Susan

Rudbeckia hirta 'American Gold Rush'

Zones 4–10· 423 saves· from $17
Gay Butterflies Mix Butterfly Weed

Gay Butterflies Mix Butterfly Weed

Asclepias tuberosa 'Gay Butterflies Mix'

Zones 4–9· 420 saves
Pugster Amethyst Butterfly Bush

Pugster Amethyst Butterfly Bush

Buddleja davidii 'Pugster Amethyst'

Zones 5–9· 419 saves· from $19
Butterfly Milkweed

Butterfly Milkweed

Asclepias x hybrida

Zones 4–9· 413 saves· from $13
Zinnia Raggedy Ann

Zinnia Raggedy Ann

Zinnia elegans 'Raggedy Ann'

Zones 5–10· 406 saves
Mixed Border Blanket Flower

Mixed Border Blanket Flower

Gaillardia x grandiflora 'Mixed Border'

Zones 4–10· 405 saves
Prairie Phlox

Prairie Phlox

Phlox pilosa

Zones 4–9· 403 saves
Cinderella Milkweed

Cinderella Milkweed

Asclepias incarnata 'Cinderella'

Zones 4–9· 385 saves· from $17
Goldsturm Black-eyed Susan

Goldsturm Black-eyed Susan

Rudbeckia fulgida 'Goldsturm'

Zones 4–9· 381 saves· from $9
Common Milkweed

Common Milkweed

Asclepias syriaca

Zones 4–9· 380 saves· from $13
Wild Lupine

Wild Lupine

Lupinus perennis

Zones 4–9· 367 saves
Coral Honeysuckle

Coral Honeysuckle

Lonicera sempervirens 'Coral Honeysuckle'

Zones 4–10· 367 saves· from $19
Trio Butterfly Bush

Trio Butterfly Bush

Buddleja davidii 'Trio'

Zones 5–9· 362 saves
Dahlia

Dahlia

Dahlia variabilis

Zones 5–10· 353 saves
Beardtongue Rondo

Beardtongue Rondo

Penstemon barbatus 'Rondo'

Zones 4–9· 349 saves
Limelight Hydrangea

Limelight Hydrangea

Hydrangea paniculata 'Limelight'

Zones 4–9· 347 saves· from $22

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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?

8,125 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.

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