How many chill hours does 56303 get?

56303 averages 1110 chill hours per winter, ranging from 818 to 1435 across the last 10 years.

What hardiness zone is 56303?

56303 is in USDA hardiness zone 4b.

Location almanac

The short answer

56303 averages 1,110 chill hours per winter (818–1,435 across 10 years) in USDA zone 4b.

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 56303’s chill hours and zone:

Chill and zone requirements are comfortably met in 56303.

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How many chill hours does 56303 get?: 56303 averages 1110 chill hours per winter, ranging from 818 to 1435 across the last 10 years.
What hardiness zone is 56303?: 56303 is in USDA hardiness zone 4b.

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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