How many chill hours does 70528 get?

70528 averages 384 chill hours per winter, ranging from 153 to 492 across the last 10 years.

What hardiness zone is 70528?

70528 is in USDA hardiness zone 9b.

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The short answer

70528 averages 384 chill hours per winter (153–492 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 70528’s chill hours and zone:

Chill and zone requirements are comfortably met in 70528.

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

How many chill hours does 70528 get?: 70528 averages 384 chill hours per winter, ranging from 153 to 492 across the last 10 years.
What hardiness zone is 70528?: 70528 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