How many chill hours does 55709 get?

55709 averages 994 chill hours per winter, ranging from 737 to 1301 across the last 10 years.

What hardiness zone is 55709?

55709 is in USDA hardiness zone 3b.

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The short answer

55709 averages 994 chill hours per winter (737–1,301 across 10 years) in USDA zone 3b.

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 55709’s chill hours and zone:

Chill and zone requirements are comfortably met in 55709.

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How many chill hours does 55709 get?: 55709 averages 994 chill hours per winter, ranging from 737 to 1301 across the last 10 years.
What hardiness zone is 55709?: 55709 is in USDA hardiness zone 3b.

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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