How many chill hours does 21550 get?

21550 averages 1448 chill hours per winter, ranging from 1272 to 1669 across the last 10 years.

What hardiness zone is 21550?

21550 is in USDA hardiness zone 6a.

Location almanac

The short answer

21550 averages 1,448 chill hours per winter (1,272–1,669 across 10 years) in USDA zone 6a.

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 21550’s chill hours and zone:

Chill and zone requirements are comfortably met in 21550.

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How many chill hours does 21550 get?: 21550 averages 1448 chill hours per winter, ranging from 1272 to 1669 across the last 10 years.
What hardiness zone is 21550?: 21550 is in USDA hardiness zone 6a.

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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