How many chill hours does 85543 get?

85543 averages 534 chill hours per winter, ranging from 268 to 951 across the last 10 years.

What hardiness zone is 85543?

85543 is in USDA hardiness zone 8b.

Location almanac

The short answer

85543 averages 534 chill hours per winter (268–951 across 10 years) in USDA zone 8b.

85543 climate
Average chill hours	534 (268–951 across 10 winters)
USDA hardiness zone	8b
Last spring frost	typically January 24 – February 18
First fall frost	typically November 12 – December 29

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 85543’s chill hours and zone:

Chill and zone requirements are comfortably met in 85543.

Show 71 more good fit varieties

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

Show 26 more marginal varieties

How many chill hours does 85543 get?: 85543 averages 534 chill hours per winter, ranging from 268 to 951 across the last 10 years.
What hardiness zone is 85543?: 85543 is in USDA hardiness zone 8b.

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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