耐寒分區 9b 的溫度定義為何?
耐寒分區 9b 的定義為年平均極端最低氣溫為 25 °F 到 30 °F (−3.9 °C 到 −1.1 °C)。 這是 9 區較溫暖的一半,總範圍從 20 °F 到 30 °F。
該數值是 1991–2020 年氣象紀錄中,每個冬季最冷夜晚的 30 年平均值,用於 2023 年美國農業部地圖。個別冬季的氣溫通常會低幾度,因此耐寒等級剛好為 9b 區的植物,若使用覆蓋物並放置在避風處將會受益。尚未了解自己所在分區的園藝愛好者,可以在比較植物前 透過郵遞區號查詢您的 USDA 耐寒分區。
哪些州屬於 9b 耐寒分區?
9b 區出現在美國本土的 10 個州。根據 2023 年 USDA 官方郵遞區號表,California, Texas, Florida, Arizona 和 Louisiana 擁有最多 9b 區的郵遞區號。
- California · 879 個郵遞區號
- Texas · 423 個郵遞區號
- Florida · 333 個郵遞區號
- Arizona · 203 個郵遞區號
- Louisiana · 170 個郵遞區號
- Nevada · 60 個郵遞區號
- Oregon · 11 個郵遞區號
- South Carolina · 4 個郵遞區號
- Alabama · 1 個郵遞區號
- Washington · 1 個郵遞區號
耐寒分區依據海拔和水域劃分,而非州界,因此大多數州跨越了多個分區。
9b 分區適合種植哪些植物?
PlantoScan 目錄中有 286 種植物在 9b 分區具耐寒性,這意味著 9b 分區落在它們的耐寒範圍內。 它們包括 78 種喬木, 53 種灌木, 50 種多年生植物、香草與花卉, 33 種藤本與攀緣植物。
樹木(適用於 9b 區) (78)

Azalea
Azalea indica
Zone 6a – 9b
AI 生成

Japanese Maple
Acer palmatum
Zone 5a – 9b
AI 生成

Gardenia
Gardenia jasminoides
Zone 8a – 11b
AI 生成

Magnolia Tree
Magnolia grandiflora
Zone 7a – 10a
Joseph McPhailCC BY 4.0iNaturalist已調整大小

Bird Of Paradise
Strelitzia reginae
Zone 9b – 11b
AI 生成

Butterfly Bush
Buddleja davidii
Zone 5a – 9b
PlantoscanAI 生成

Dogwood Tree
Cornus florida
Zone 5 – 9
no rights reservedCC0 1.0iNaturalist

Fig Tree
Ficus carica
Zone 7a – 11b
圖片:PlantoScan

Camellia
Camellia japonica
Zone 6b – 10a
no rights reservedCC0 1.0iNaturalist
- Redbud Tree
- Elephant Ear Plant
- Oleander
- Live Oak
- Sago Palm
- Apple Tree
- Peach Tree
- Yucca Plant
- Jerusalem Artichoke
- Eastern Red Cedar
- Avocado Tree
- Red Maple Tree
- Orange Tree
- Sweetbay Magnolia
- Plum Tree
- Pomegranate Tree
- Pear Tree
- Common Hackberry
- Norfolk Island Pine
- Cedar Of Lebanon
- Lime Tree
- Italian Cypress
- Pineapple Guava
- Honey Locust
- Cherry Laurel
- Willow Oak
- Bay Laurel Tree
- Black Locust
- Sasanqua Camellia
- Creeping Juniper
- Golden Rain Tree
- Sweetgum Tree
- Firethorn
- Taro Plant
- American Beech
- Coast Live Oak
- Blackberry Plant
- Silver Maple Tree
- Flowering Quince
- Indoor Olive Tree
- Vine Maple
- Chinese Fringe Tree
- Arizona Cypress
- Japanese Black Pine
- Monterey Cypress
- Japanese Aralia
- Sourwood Tree
- Alocasia Odora
- Spineless Yucca
- Japanese Apricot
- Giant Taro
- Cider Gum
- Oriental Arborvitae
- False Indigo Bush
- Crimson Bottlebrush
- Leatherleaf Mahonia
- Weeping Bottlebrush
- Calamondin Orange
- Adams Needle Yucca
- Spanish Bayonet
- Chinese Redbud
- New Zealand Christmas Tree
- Tree Philodendron
- Cabbage Tree
- Ponytail Palm
- Chinese Hibiscus
- Lemon Tree
- Rose of Sharon
- Orange Jasmine
灌木(適用於 9b 區) (53)

Hydrangea
Hydrangea macrophylla
Zone 5 – 9
AI 生成

Carnation
Dianthus caryophyllus
Zone 5a – 9b
AI 生成

Arugula
Eruca sativa
Zone 5a – 10b
AI 生成

Lemon Balm
Melissa officinalis
Zone 4a – 9b
圖片:PlantoScan

Lavender Plant
Lavandula angustifolia
Zone 5a – 9b
圖片:PlantoScan

Crown Of Thorns
Euphorbia milii
Zone 9b – 12b
AI 生成

Caladium
Caladium bicolor
Zone 9b – 12b
AI 生成

Coral Bells
Heuchera sanguinea
Zone 4a – 9b
AI 生成

Boston Fern
Nephrolepis exaltata
Zone 9a – 11b
AI 生成
- Rose Bush
- Cyclamen
- Sage Plant
- Lemon Verbena
- Potato Plant
- Mock Strawberry
- Gardenia Bush
- Spanish Lavender
- Pencil Cactus
- White Snakeroot
- African Milk Tree
- Indian Blanket
- Globe Amaranth
- Pickerelweed
- China Aster
- Devils Backbone Plant
- Black Mondo Grass
- Ribwort Plantain
- Cleveland Sage
- Chinese Forget Me Not
- Lemon Button Fern
- Jerusalem Sage
- Silver Dollar Plant
- Panda Plant
- Coontie
- Orange Coneflower
- Welsh Onion
- Common Soapwort
- Summer Snapdragon
- Lavandin
- Maiden Pink
- Mediterranean Spurge
- Candelabra Tree
- Stinking Hellebore
- White Stonecrop
- Spider Plant
- Cast Iron Plant
- Xanadu Philodendron
- Jade Plant
- Hardy Elephant Ear
- Chinese Taro
- Bell Pepper
- Purple Coneflower
- Patriot Hosta
多年生植物、香草與花卉(適用於 9b 區) (50)

Chrysanthemum
Chrysanthemum morifolium
Zone 5a – 9b
PlantoscanAI 生成

Poppy
Papaver somniferum
Zone 3a – 9b
AI 生成
- DahliaDahlia pinnataPlantoScan
Dahlia
Dahlia pinnata
Zone 8a – 11b

Alfalfa
Medicago sativa
Zone 3a – 10a
AI 生成

Calla Lily
Zantedeschia aethiopica
Zone 8a – 10b
AI 生成

Zinnia
Zinnia elegans
Zone 9a – 13b
ErmellCC BY-SA 4.0Wikimedia Commons已調整大小

Snapdragon
Antirrhinum majus
Zone 7a – 10b
AI 生成

Bee Balm
Monarda didyma
Zone 3a – 9b
Alex AbairCC BY 4.0iNaturalist已調整大小

Catnip
Nepeta cataria
Zone 3 – 9
AI 生成
- Stinging Nettle
- Cornflower
- Hosta Plant
- Red Ginger
- Cardinal Flower
- Comfrey
- Freesia
- Spearmint
- Banana Plant
- Blue False Indigo
- Rapeseed
- Peruvian Lily
- Lambs Quarters
- Cardoon
- Broccoli Plant
- Jonquil
- African Daisy
- Garlic Plant
- Lanceleaf Coreopsis
- Blazing Star
- Oregano Plant
- Society Garlic
- Showy Milkweed
- Turmeric Plant
- Japanese Iris
- Spotted Bee Balm
- Paperwhite Narcissus
- Love In A Mist
- Tropical Milkweed
- Sacred Lotus
- Elecampane
- Apple Mint
- Bears Breeches
- Corsican Mint
- Clivia Lily
- Siam Tulip
- Torch Ginger
- Belladonna Lily
- Tree Dahlia
- Foothill Penstemon
- Winter Savory
藤本與攀緣植物(適用於 9b 區) (33)

Spanish Flag
Ipomoea lobata
Zone 9a – 12b
AI 生成

Wisteria
Wisteria sinensis
Zone 5a – 9b
AI 生成

Bougainvillea
Bougainvillea glabra
Zone 9b – 11b
Simon ScotlandCC BY 4.0iNaturalist已調整大小

Grape Vine
Vitis vinifera
Zone 5b – 10a
AI 生成

Watercress
Nasturtium officinale
Zone 5a – 11b
Dmitriy BochkovCC BY 4.0iNaturalist已調整大小

English Ivy
Hedera helix
Zone 4a – 9b
AI 生成

Nasturtium
Tropaeolum majus
Zone 9b – 11b
Antonio W. SalasCC BY 4.0iNaturalist已調整大小

Fava Bean
Vicia faba
Zone 2a – 11b
AI 生成

Mung Bean
Vigna radiata
Zone 9b – 13
renjus boxCC BY 4.0iNaturalist已調整大小
- Wandering Jew Plant
- Purple Heart Plant
- Asparagus Plant
- Blue Passion Flower
- Maypop
- Pea Plant
- Split Leaf Philodendron
- Black Eyed Susan Vine
- Sweet Autumn Clematis
- Moses In The Cradle
- Passion Fruit Vine
- Pink Jasmine
- Hairy Vetch
- Moonflower Vine
- Cape Aloe
- Evergreen Clematis
- Heavenly Blue Morning Glory
- Fan Aloe
- Alpine Clematis
- Small Leaf Spiderwort
- False Shamrock
- Arabian Jasmine
- Creeping Fig
- Sweet Potato Vine
多肉植物與仙人掌(適用於 9b 區) (26)

Stonecrop
Sedum spectabile
Zone 3a – 9b
no rights reservedCC0 1.0iNaturalist

Blue Agave
Agave tequilana
Zone 9b – 11b
no rights reservedCC0 1.0iNaturalist

Prickly Pear Cactus
Opuntia ficus-indica
Zone 9a – 11b
no rights reservedCC0 1.0iNaturalist

Century Plant
Agave americana
Zone 8a – 11b
zebedeugalinhaCC BY 4.0iNaturalist已調整大小

Calico Kitten
Crassula pellucida
Zone 9b – 11b
no rights reservedCC0 1.0iNaturalist

Golden Barrel Cactus
Echinocactus grusonii
Zone 9b – 11b
Kevin FaccendaCC BY 4.0iNaturalist已調整大小

Peruvian Apple Cactus
Cereus peruvianus
Zone 9b – 11b
Paul Asman and Jill LenobleCC BY 4.0iNaturalist已調整大小

Aeonium
Aeonium arboreum
Zone 9b – 11b
Sheelagh HalseyCC BY 4.0iNaturalist已調整大小

Moon Cactus
Gymnocalycium mihanovichii
Zone 9b – 11b
Romi Galeota LencinaCC BY 4.0iNaturalist已調整大小
草類(適用於 9b 區) (21)

Lemongrass
Cymbopogon citratus
Zone 9b – 12b
AI 生成

Papyrus
Cyperus papyrus
Zone 9a – 12b
Shaun SwanepoelCC BY 4.0iNaturalist已調整大小

Big Bluestem
Andropogon gerardii
Zone 3a – 9b
RoreyCC BY 4.0iNaturalist已調整大小

Switchgrass
Panicum virgatum
Zone 3 – 9
no rights reservedCC0 1.0iNaturalist

Fountain Grass
Pennisetum alopecuroides
Zone 5a – 9b
AI 生成

Purple Fountain Grass
Pennisetum setaceum
Zone 8a – 11b
AI 生成

Blue Grama Grass
Bouteloua gracilis
Zone 3a – 10b
Matt LavinCC BY 4.0iNaturalist已調整大小

Feather Reed Grass
Calamagrostis acutiflora
Zone 4a – 9b
no rights reservedCC0 1.0iNaturalist

Black Bamboo
Phyllostachys nigra
Zone 6a – 10b
the swamp assCC BY 4.0iNaturalist已調整大小
蕨類(適用於 9b 區) (5)

Horsetail Plant
Equisetum hyemale
Zone 3a – 11b
no rights reservedCC0 1.0iNaturalist

Royal Fern
Osmunda regalis
Zone 3a – 9b
Karthik ThrikkadeeriCC BY 4.0iNaturalist已調整大小

Australian Tree Fern
Cyathea cooperi
Zone 9a – 11
AI 生成

Blue Star Fern
Polypodium aureum
Zone 9b – 11b
AI 生成

Japanese Holly Fern
Cyrtomium falcatum
Zone 6a – 9b
AI 生成
棕櫚類(適用於 9b 區) (4)
其他植物(適用於 9b 區) (16)

Petunia
Petunia hybrida
Zone 9a – 11b
Bonnie SemmlingCC BY 4.0iNaturalist已調整大小

Pansy
Viola tricolor
Zone 3a – 9b
Kostas ZontanosCC BY 4.0iNaturalist已調整大小

Strawberry Plant
Fragaria ananassa
Zone 3a – 10b
Николай СоболевCC BY 4.0iNaturalist已調整大小

Mustard Greens
Brassica juncea
Zone 8a – 11b
Raja Sekhar ChimiralaCC BY 4.0iNaturalist已調整大小

Mexican Petunia
Ruellia brittoniana
Zone 8a – 11b
Greg III EsperaCC BY 4.0iNaturalist已調整大小
Water Hyacinth
Eichhornia crassipes
Zone 9a – 13b
Mattia MenchettiCC BY 4.0iNaturalist已調整大小

Ladys Mantle
Alchemilla mollis
Zone 3a – 9b
Thomas GyselinckCC BY 4.0iNaturalist已調整大小

Pumpkin Plant
Cucurbita maxima
Zone 3a – 11b
Gonzalo RogetCC BY 4.0iNaturalist已調整大小

Foamflower
Tiarella cordifolia
Zone 3a – 9b
Michael J. PapayCC BY 4.0iNaturalist已調整大小
哪些熱門植物在 9b 分區無法越冬?
這些熱門植物需要比 9b 區更溫暖的環境才能在戶外越冬。請將它們作為室內植物種植,或種植在霜害前可移入室內的盆栽中,亦可作為每年春季重新種植的一年生植物。

Ashwagandha
Withania somnifera
Zone 10a – 12b
AI 生成

Cosmos
Cosmos bipinnatus
Zone 10b – 13b
PlantoscanAI 生成

Marigold
Tagetes erecta
Zone 10b – 12b
PlantoscanAI 生成

Peace Lily
Spathiphyllum wallisii
Zone 11b – 12b
AI 生成

Aloe Vera
Aloe vera
Zone 10a – 12b
Carlos Domínguez-RodríguezCC BY 4.0iNaturalist已調整大小

Pothos
Epipremnum aureum
Zone 10b – 12b
AI 生成

Eggplant
Solanum melongena
Zone 10a – 11b
AI 生成

Zz Plant
Zamioculcas zamiifolia
Zone 10b – 12b
圖片:PlantoScan

Christmas Cactus
Schlumbergera bridgesii
Zone 10b – 12b
Victor Farjalla PontesCC BY 4.0iNaturalist已調整大小
如何在 9b 耐寒分區成功進行園藝?
成功的 9b 區花園依賴於耐寒分區為 9 或更低等級的多年生植物、灌木和樹木。耐寒分區剛好為 9b 的植物通常能度過一般的冬天,但若能覆蓋護根、設置防風林並種植在溫暖牆邊,對其生長更有利。
耐寒分區僅描述冬季寒冷程度。種植日期取決於您當地的春季最後霜日與秋季首次霜日,即使在同一個 9b 分區內,這些日期也可能相差數週——依郵遞區號查詢最後霜日計算器可提供您花園的確切日期。夏季高溫、降雨量和土壤排水性決定了耐寒植物是否能茁壯成長。微氣候也很重要:高架花圃、坡地和鋪面區域升溫較快,而低窪地在無風的夜晚則會聚集冷空氣。
分區溫度與郵遞區號:2023 年 USDA 植物耐寒分區圖,由 USDA 農業研究局與奧勒岡州立大學 PRISM 氣候小組提供。植物耐寒範圍來自 PlantoScan 的植物資料庫,僅供參考 — 當地環境、栽培品種與冬季防護措施會影響植物的存活率。
