How many chill hours does 36509 get?

36509 averages 309 chill hours per winter, ranging from 140 to 436 across the last 10 years.

What hardiness zone is 36509?

36509 is in USDA hardiness zone 9a.

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The short answer

36509 averages 309 chill hours per winter (140–436 across 10 years) in USDA zone 9a.

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 36509’s chill hours and zone:

Chill and zone requirements are comfortably met in 36509.

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

How many chill hours does 36509 get?: 36509 averages 309 chill hours per winter, ranging from 140 to 436 across the last 10 years.
What hardiness zone is 36509?: 36509 is in USDA hardiness zone 9a.

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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