How many chill hours does 21811 get?

21811 averages 1437 chill hours per winter, ranging from 1045 to 1726 across the last 10 years.

What hardiness zone is 21811?

21811 is in USDA hardiness zone 7b.

Location almanac

The short answer

21811 averages 1,437 chill hours per winter (1,045–1,726 across 10 years) in USDA zone 7b.

21811 climate
Average chill hours	1,437 (1,045–1,726 across 10 winters)
USDA hardiness zone	7b
Last spring frost	typically March 9 – April 1
First fall frost	typically November 11 – December 1

Computed from 10 winters of ERA5 hourly temperature (Open-Meteo, 2015–2025); zones from USDA PHZM 2023. Data updated July 3, 2026. See methodology.

Every variety in our database, checked against 21811’s chill hours and zone:

Chill and zone requirements are comfortably met in 21811.

Show 131 more good fit varieties

How many chill hours does 21811 get?: 21811 averages 1437 chill hours per winter, ranging from 1045 to 1726 across the last 10 years.
What hardiness zone is 21811?: 21811 is in USDA hardiness zone 7b.

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[1] Open-Meteo / Copernicus ERA5. Historical Weather API (hourly 2m temperature) — accessed July 2026
[2] USDA / PRISM (Oregon State University). 2023 USDA Plant Hardiness Zone Map — accessed July 2026