耐寒分區 8b 的溫度範圍是多少?
耐寒分區 8b 的定義是年平均極端最低氣溫為 15 °F 至 20 °F (−9.4 °C 至 −6.7 °C)。 這是 8 區較溫暖的一半,總體範圍從 10 °F 到 20 °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 8b 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 8b 耐寒分區?
8b 區出現在美國本土的 17 個州。根據官方 2023 年 USDA 郵遞區號表,Texas, Alabama, Georgia, Mississippi 和 Washington 擁有最多屬於 8b 區的郵遞區號。
- Texas · 978 個郵遞區號
- Alabama · 335 個郵遞區號
- Georgia · 318 個郵遞區號
- Mississippi · 303 個郵遞區號
- Washington · 263 個郵遞區號
- South Carolina · 261 個郵遞區號
- Louisiana · 190 個郵遞區號
- Oregon · 189 個郵遞區號
- North Carolina · 162 個郵遞區號
- California · 112 個郵遞區號
- Arkansas · 88 個郵遞區號
- Virginia · 63 個郵遞區號
- Arizona · 60 個郵遞區號
- New Mexico · 20 個郵遞區號
- Nevada · 14 個郵遞區號
- Florida · 10 個郵遞區號
- Utah · 9 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 8b 適合種植哪些植物?
PlantoScan 目錄中有 266 種植物在 8b 分區中可生長,這意味著 8b 分區位於它們的耐寒範圍內。 它們包括 91 種樹木, 39 種灌木, 61 種多年生植物、草本植物與花卉, 19 種藤本與攀緣植物。
樹木(適用於 8b 區) (91)

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

Cherry Blossom Tree
Prunus serrulata
Zone 5a – 8b
AI 生成
- Camellia
- Redbud Tree
- Elephant Ear Plant
- Oleander
- Red Oak
- Live Oak
- Ginkgo Tree
- Cherry Tree
- Boxwood
- Sago Palm
- Apple Tree
- Peach Tree
- Viburnum
- Panicle Hydrangea
- Jerusalem Artichoke
- Eastern Red Cedar
- Spirea
- Red Maple Tree
- Sweetbay Magnolia
- Plum Tree
- Pomegranate Tree
- Pear Tree
- Bur Oak
- Sugar Maple Tree
- Common Hackberry
- Eastern White Pine
- Cedar Of Lebanon
- Italian Cypress
- Pineapple Guava
- Honey Locust
- Cherry Laurel
- Pin Oak
- Willow Oak
- Hinoki Cypress
- Bay Laurel Tree
- Swamp White Oak
- Black Locust
- Sasanqua Camellia
- Scotch Broom
- Creeping Juniper
- Golden Rain Tree
- Sweetgum Tree
- Firethorn
- Taro Plant
- American Beech
- Lodgepole Pine
- Apricot Tree
- Coast Live Oak
- Blackberry Plant
- Silver Maple Tree
- Flowering Quince
- Indoor Olive Tree
- Vine Maple
- Chinese Fringe Tree
- American Yellowwood
- Washington Hawthorn
- Arizona Cypress
- Japanese Black Pine
- American Plum
- Bridal Wreath Spirea
- Monterey Cypress
- Japanese Aralia
- Sourwood Tree
- Chinese Chestnut
- Japanese Snowbell
- European Hornbeam
- Japanese Apricot
- Shellbark Hickory
- Cider Gum
- Oriental Arborvitae
- Doublefile Viburnum
- False Indigo Bush
- Leatherleaf Mahonia
- Persian Ironwood
- Calamondin Orange
- Adams Needle Yucca
- Vanhoutte Spirea
- Spanish Bayonet
- Chinese Redbud
- Handkerchief Tree
- Cabbage Tree
- Rose of Sharon
灌木(適用於 8b 區) (39)

Hydrangea
Hydrangea macrophylla
Zone 5 – 9
AI 生成
- DaisyBellis perennisPlantoScan
Daisy
Bellis perennis
Zone 4a – 8b

Carnation
Dianthus caryophyllus
Zone 5a – 9b
AI 生成

Arugula
Eruca sativa
Zone 5a – 10b
AI 生成

Hyacinth
Hyacinthus orientalis
Zone 4 – 8
AI 生成

Forget Me Not
Myosotis sylvatica
Zone 3 – 8
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
- Rose Bush
- Sage Plant
- Lemon Verbena
- Potato Plant
- Mock Strawberry
- Gardenia Bush
- Spanish Lavender
- Garlic Chives
- White Snakeroot
- Indian Blanket
- Pickerelweed
- China Aster
- Black Mondo Grass
- Japanese Spurge
- Ribwort Plantain
- Chinese Forget Me Not
- Lemon Button Fern
- Jerusalem Sage
- Orange Coneflower
- Welsh Onion
- Common Soapwort
- Lavandin
- Barren Strawberry
- 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 8b 區) (61)

Peony
Paeonia lactiflora
Zone 3 – 8
AI 生成

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

Daffodil
Narcissus poeticus
Zone 3 – 8
AI 生成

Alfalfa
Medicago sativa
Zone 3a – 10a
AI 生成

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

Snapdragon
Antirrhinum majus
Zone 7a – 10b
AI 生成

Tiger Lily
Lilium lancifolium
Zone 3 – 8
AI 生成
- Bee Balm
- Catnip
- Creeping Thyme
- Stinging Nettle
- Astilbe
- Cornflower
- Hosta Plant
- Lupine
- Cardinal Flower
- Comfrey
- Spearmint
- Banana Plant
- Blue False Indigo
- Rapeseed
- Balloon Flower
- Peruvian Lily
- New England Aster
- Lambs Quarters
- Cardoon
- Broccoli Plant
- Jonquil
- Garlic Plant
- Lanceleaf Coreopsis
- Blazing Star
- Oregano Plant
- Monkshood
- Society Garlic
- Dolls Eyes
- Showy Milkweed
- Turmeric Plant
- Japanese Iris
- Spotted Bee Balm
- Paperwhite Narcissus
- Love In A Mist
- Tropical Milkweed
- Sacred Lotus
- Elecampane
- Apple Mint
- Bears Breeches
- Yellow Coneflower
- Corsican Mint
- Canada Anemone
- Wood Anemone
- Blue Cohosh
- Rocky Mountain Penstemon
- Siam Tulip
- Hairy Beardtongue
- Belladonna Lily
- Clustered Bellflower
- Pale Purple Coneflower
- Foothill Penstemon
- Winter Savory
藤本與攀緣植物(適用於 8b 區) (19)

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
- Purple Heart PlantTradescantia pallidaPlantoScan
Purple Heart Plant
Tradescantia pallida
Zone 8b – 12b

Asparagus Plant
Asparagus officinalis
Zone 2a – 9b
AI 生成

Raspberry Plant
Rubus idaeus
Zone 3 – 8
Lauren MarkewiczCC BY 4.0iNaturalist已調整大小

Blue Passion Flower
Passiflora caerulea
Zone 6a – 11b
AI 生成
多肉植物與仙人掌(適用於 8b 區) (8)

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

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

Woodland Stonecrop
Sedum ternatum
Zone 4a – 8b
Evan M. RaskinCC BY 4.0iNaturalist已調整大小

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

Blue Spruce Stonecrop
Sedum reflexum
Zone 3a – 8b
zebedeugalinhaCC 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

Goldmoss Stonecrop
Sedum acre
Zone 3a – 8b
Dmitriy BochkovCC 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 8b 區) (21)

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

Blue Fescue
Festuca glauca
Zone 4a – 8b
PlantoscanAI 生成

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

Pennsylvania Sedge
Carex pensylvanica
Zone 3a – 8b
Evan M. RaskinCC BY 4.0iNaturalist已調整大小

Black Bamboo
Phyllostachys nigra
Zone 6a – 10b
the swamp assCC BY 4.0iNaturalist已調整大小
蕨類植物(適用於 8b 區) (9)

Christmas Fern
Polystichum acrostichoides
Zone 3a – 8b
Michael J. PapayCC BY 4.0iNaturalist已調整大小

Japanese Painted Fern
Athyrium niponicum
Zone 3a – 8b
Sandy WolkenbergCC BY 4.0iNaturalist已調整大小

Lady Fern
Athyrium filix-femina
Zone 3a – 8b
no rights reservedCC0 1.0iNaturalist

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

Autumn Fern
Dryopteris erythrosora
Zone 6a – 8b
Anne ParkerCC BY 4.0iNaturalist已調整大小

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

Western Sword Fern
Polystichum munitum
Zone 3a – 8b
Ed AlversonCC BY 4.0iNaturalist已調整大小

Japanese Holly Fern
Cyrtomium falcatum
Zone 6a – 9b
AI 生成

Northern Maidenhair Fern
Adiantum pedatum
Zone 3 – 8
Ed AlversonCC BY 4.0iNaturalist已調整大小
棕櫚類(適用於 8b 區) (1)
其他植物(適用於 8b 區) (17)

Wild Ginger
Asarum canadense
Zone 3a – 8b
Alex KarasoulosCC 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

Lambs Ear
Stachys byzantina
Zone 4a – 8b
no rights reservedCC0 1.0iNaturalist

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

Lungwort
Pulmonaria saccharata
Zone 3a – 8b
Daniel CahenCC 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
哪些受歡迎的植物在 8b 區無法越冬?
這些受歡迎的植物需要比 8b 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

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

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

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
你如何在 8b 耐寒分區成功進行園藝?
成功的 8b 區花園依賴於耐寒等級為 8 或更低區的多年生植物、灌木和樹木。耐寒等級剛好為 8b 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 8b 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。