How many chill hours does 18104 get?

18104 averages 1691 chill hours per winter, ranging from 1428 to 2007 across the last 10 years.

What hardiness zone is 18104?

18104 is in USDA hardiness zone 7a.

Location almanac

The short answer

18104 averages 1,691 chill hours per winter (1,428–2,007 across 10 years) in USDA zone 7a.

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 18104’s chill hours and zone:

Chill and zone requirements are comfortably met in 18104.

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How many chill hours does 18104 get?: 18104 averages 1691 chill hours per winter, ranging from 1428 to 2007 across the last 10 years.
What hardiness zone is 18104?: 18104 is in USDA hardiness zone 7a.

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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