耐寒分區 9a 的溫度範圍是多少?
耐寒分區 9a 的定義是年平均極端最低氣溫為 20 °F 至 25 °F (−6.7 °C 至 −3.9 °C)。 這是 9 區較冷的一半,總體範圍從 20 °F 到 30 °F。
該數值是 2023 年美國農業部地圖根據 1991–2020 年氣象記錄計算出的每個冬季最冷夜晚的 30 年平均值。個別冬季的氣溫通常會低幾度,因此耐寒等級剛好在 9a 區的植物,若能使用覆蓋物並種植在避風處將會受益。尚未了解自己所在分區的園丁,可以在比較植物前 透過郵政編碼查詢您的美國農業部耐寒分區。
哪些州屬於 9a 耐寒分區?
9a 區出現在美國本土的 13 個州。根據官方 2023 年 USDA 郵遞區號表,Texas, Louisiana, Florida, California 和 Georgia 擁有最多屬於 9a 區的郵遞區號。
- Texas · 555 個郵遞區號
- Louisiana · 344 個郵遞區號
- Florida · 270 個郵遞區號
- California · 236 個郵遞區號
- Georgia · 211 個郵遞區號
- Washington · 137 個郵遞區號
- Oregon · 115 個郵遞區號
- Alabama · 87 個郵遞區號
- Arizona · 67 個郵遞區號
- South Carolina · 56 個郵遞區號
- Nevada · 52 個郵遞區號
- Mississippi · 49 個郵遞區號
- North Carolina · 20 個郵遞區號
耐寒分區遵循海拔和水域,而非州界,因此大多數州跨越了多個分區。
Zone 9a 適合種植哪些植物?
PlantoScan 目錄中有 221 種植物在 9a 分區中可生長,這意味著 9a 分區位於它們的耐寒範圍內。 它們包括 67 種樹木, 39 種灌木, 46 種多年生植物、草本植物與花卉, 23 種藤本與攀緣植物。
樹木(適用於 9a 區) (67)

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

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

American Sycamore
Platanus occidentalis
Zone 4a – 9a
Tom NortonCC BY 4.0iNaturalist已調整大小

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
- Red Maple Tree
- Sweetbay Magnolia
- Plum Tree
- Pomegranate Tree
- Pear Tree
- Bur Oak
- Common Hackberry
- Cedar Of Lebanon
- 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
- Japanese Apricot
- Cider Gum
- Oriental Arborvitae
- False Indigo Bush
- Crimson Bottlebrush
- Leatherleaf Mahonia
- Calamondin Orange
- Adams Needle Yucca
- Spanish Bayonet
- Chinese Redbud
- New Zealand Christmas Tree
- Cabbage Tree
- Lemon Tree
- Rose of Sharon
灌木(適用於 9a 區) (39)

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

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

Boston Fern
Nephrolepis exaltata
Zone 9a – 11b
AI 生成

Rose Bush
Rosa chinensis
Zone 7a – 9b
AI 生成

Cyclamen
Cyclamen persicum
Zone 9a – 11b
Daniel CahenCC BY 4.0iNaturalist已調整大小
- Sage Plant
- Lemon Verbena
- Potato Plant
- Mock Strawberry
- Gardenia Bush
- Spanish Lavender
- White Snakeroot
- Indian Blanket
- Globe Amaranth
- Pickerelweed
- China Aster
- Black Mondo Grass
- Ribwort Plantain
- Cleveland Sage
- Chinese Forget Me Not
- Lemon Button Fern
- Jerusalem Sage
- Silver Dollar Plant
- Orange Coneflower
- Welsh Onion
- Common Soapwort
- Summer Snapdragon
- Lavandin
- Maiden Pink
- Mediterranean Spurge
- Stinking Hellebore
- White Stonecrop
- Cast Iron Plant
- Purple Coneflower
- Patriot Hosta
多年生植物、草本植物與花卉(適用於 9a 區) (46)

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
- Cardinal Flower
- Comfrey
- 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
- Siam Tulip
- Belladonna Lily
- Tree Dahlia
- Foothill Penstemon
- Winter Savory
藤本與攀緣植物(適用於 9a 區) (23)

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

Wisteria
Wisteria sinensis
Zone 5a – 9b
AI 生成

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

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

Wandering Jew Plant
Tradescantia zebrina
Zone 9a – 11b
AI 生成
- Purple Heart PlantTradescantia pallidaPlantoScan
Purple Heart Plant
Tradescantia pallida
Zone 8b – 12b

Asparagus Plant
Asparagus officinalis
Zone 2a – 9b
AI 生成
多肉植物與仙人掌(適用於 9a 區) (7)

Stonecrop
Sedum spectabile
Zone 3a – 9b
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

Bunny Ear Cactus
Opuntia microdasys
Zone 9a – 11b
AI 生成

Beavertail Cactus
Opuntia basilaris
Zone 8a – 11b
Matt BergerCC BY 4.0iNaturalist已調整大小

Queen Victoria Agave
Agave victoriae-reginae
Zone 8a – 11b
Aurélien RoveroCC BY 4.0iNaturalist已調整大小

Mexican Grass Tree
Dasylirion longissimum
Zone 8a – 11b
Sandino GuerreroCC BY 4.0iNaturalist已調整大小
草類(適用於 9a 區) (20)

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

Prairie Dropseed
Sporobolus heterolepis
Zone 3a – 9b
Hill CraddockCC BY 4.0iNaturalist已調整大小
蕨類植物(適用於 9a 區) (4)
棕櫚類(適用於 9a 區) (2)
其他植物(適用於 9a 區) (13)

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
哪些受歡迎的植物在 9a 區無法越冬?
這些受歡迎的植物需要比 9a 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,種植在初霜前可移入室內的容器中,或作為每年春天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

Lemongrass
Cymbopogon citratus
Zone 9b – 12b
AI 生成

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

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

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

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

Pothos
Epipremnum aureum
Zone 10b – 12b
AI 生成
你如何在 9a 耐寒分區成功進行園藝?
成功的 9a 區花園依賴於耐寒等級為 9 或更低區的多年生植物、灌木和樹木。耐寒等級剛好為 9a 區的植物可以度過典型的冬天,但如果能覆蓋護根物、設置防風林並種植在溫暖的牆邊,效果會更好。
耐寒分區僅描述冬季寒冷程度。種植日期取決於你當地的春季最後霜凍日和秋季首次霜凍日,即使在同一個 9a 分區內,這些日期也可能相差數週——按郵政編碼計算的最後霜凍日計算器可提供你花園的具體日期。夏季高溫、降雨量和土壤排水情況決定了耐寒植物能否茁壯成長。微氣候同樣重要:高架花床、斜坡和鋪砌區域升溫較快,而低窪地帶在無風的夜晚會聚集冷空氣。
分區溫度與郵遞區號:2023 年 USDA 耐寒分區地圖,由 USDA 農業研究局與俄勒岡州立大學 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、栽培品種及冬季保護措施會影響植物的存活率。

