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Chill hours in H7C

The short answer

H7C averages 1,262 chill hours per winter (1,0861,639 across 10 years) in USDA zone 4b.
H7C climate
Average chill hours1,262 (1,086–1,639 across 10 winters)
USDA hardiness zone4b (NRCan zone 5b)
Last spring frosttypically April 23 – May 9
First fall frosttypically October 18 – November 3

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 H7C’s chill hours and zone:

How many chill hours does H7C get?
H7C averages 1262 chill hours per winter, ranging from 1086 to 1639 across the last 10 years.
What hardiness zone is H7C?
H7C 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