USDA Hardiness Zone 7B Growing Guide
Source: USDA Agricultural Research Service Plant Hardiness Zone Map 2023
Southeast and coastal areas — long growing season with mild winters.
Where Zone 7B sits on the national map
Zone Position
Key Facts — Zone 7B
- Avg. coldest night: 5°F to 10°F (-15°C to -12.2°C) — the band of average annual extreme minimum temperatures that defines this zone (USDA ARS PHZM 2023)
- What that means: in an average year your coldest night lands somewhere in that 5°F window. Actual lows can drop colder in extreme winters; daytime highs are not bounded by this number.
- Found In: 33 US states, including Massachusetts, California, Texas and 30 more
- Growing Considerations: Southeast and coastal areas — long growing season with mild winters.
What Is Zone 7B?
USDA Hardiness Zone 7B is defined by an average annual extreme minimum temperature between 5°F and 10°F (-15°C to -12.2°C), according to the USDA ARS Plant Hardiness Zone Map 2023.
Coldest avg. low
5°F
USDA PHZM 2023
Warmest avg. low
10°F
USDA PHZM 2023
Coldest avg. low (°C)
-15°C
USDA PHZM 2023
States
33
Where Is Zone 7B Found?
Zone 7B appears across 33 states:
Plants That Thrive in Zone 7B
Plants well-adapted to the temperature range of this zone.
Muscadine Grape
Gardenia
Pomegranate
Okra
Your Zone Is Just One Factor
Zone 7B covers 278 counties across 23 states, and their growing seasons are not the same. Plumas County, California measures 158 frost-free days a year; New York County, New York measures 258 — a 100-day difference under the same winter low, before you get to soil drainage, summer heat, flood risk, or contamination proximity. Your Growable Ground report scores 1,112 plants against all of it for your specific address.
Measured across the 278 counties whose USDA PHZM centroid falls in Zone 7B — NOAA 1991–2020 Climate Normals, 28°F killing freeze. Median 234 days.
Your zone is a starting point — your parcel is the whole story
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Frequently Asked Questions
What plants grow in Zone 7B?
Southeast and coastal areas — long growing season with mild winters. Common plants that thrive include Muscadine Grape, Gardenia, Pomegranate, Okra. Actual suitability depends on your parcel's soil, drainage, and microclimate.
What states have Zone 7B?
Zone 7B appears across 33 US states: Massachusetts, California, Texas, New York, Colorado, Georgia, Oregon, Washington, Alabama, Alaska, Arizona, Arkansas, Connecticut, Delaware, District of Columbia, Idaho, Illinois, Indiana, Kentucky, Maryland, Mississippi, Missouri, Nevada, New Jersey, New Mexico, North Carolina, Oklahoma, Pennsylvania, Rhode Island, South Carolina, Tennessee, Utah, Virginia.
What temperature is USDA Zone 7B?
USDA Hardiness Zone 7B is defined by an average annual extreme minimum temperature between 5°F and 10°F (-15°C to -12.2°C), per the USDA ARS Plant Hardiness Zone Map 2023.