How many chill hours does 28090 get?

28090 averages 1287 chill hours per winter, ranging from 1011 to 1634 across the last 10 years.

What hardiness zone is 28090?

28090 is in USDA hardiness zone 8a.

Location almanac

The short answer

28090 averages 1,287 chill hours per winter (1,011–1,634 across 10 years) in USDA zone 8a.

28090 climate
Average chill hours	1,287 (1,011–1,634 across 10 winters)
USDA hardiness zone	8a
Last spring frost	typically March 9 – April 10
First fall frost	typically November 9 – December 1

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 28090’s chill hours and zone:

Chill and zone requirements are comfortably met in 28090.

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How many chill hours does 28090 get?: 28090 averages 1287 chill hours per winter, ranging from 1011 to 1634 across the last 10 years.
What hardiness zone is 28090?: 28090 is in USDA hardiness zone 8a.

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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