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Chill hours in K7V

The short answer

K7V averages 1,291 chill hours per winter (1,0681,621 across 10 years) in USDA zone 4b.
K7V climate
Average chill hours1,291 (1,068–1,621 across 10 winters)
USDA hardiness zone4b (NRCan zone 5a)
Last spring frosttypically April 27 – May 15
First fall frosttypically October 18 – November 4

Computed from 10 winters of ERA5 hourly temperature (Open-Meteo, 2015–2025); zones from USDA PHZM 2023 / NRCan 1981–2010. Data updated July 3, 2026. See methodology.

Every variety in our database, checked against K7V’s chill hours and zone:

How many chill hours does K7V get?
K7V averages 1291 chill hours per winter, ranging from 1068 to 1621 across the last 10 years.
What hardiness zone is K7V?
K7V is in USDA hardiness zone 4b.

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Sources

  1. [1] Open-Meteo / Copernicus ERA5. Historical Weather API (hourly 2m temperature) — accessed July 2026
  2. [2] Natural Resources Canada. Plant Hardiness Zones of Canada — accessed July 2026