How many chill hours does 85351 get?

85351 averages 394 chill hours per winter, ranging from 222 to 656 across the last 10 years.

What hardiness zone is 85351?

85351 is in USDA hardiness zone 9b.

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The short answer

85351 averages 394 chill hours per winter (222–656 across 10 years) in USDA zone 9b.

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 85351’s chill hours and zone:

Chill and zone requirements are comfortably met in 85351.

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Possible in a good year or a favorable microclimate — click through for the caveats.

How many chill hours does 85351 get?: 85351 averages 394 chill hours per winter, ranging from 222 to 656 across the last 10 years.
What hardiness zone is 85351?: 85351 is in USDA hardiness zone 9b.

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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