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Chill hours in P3P

The short answer

P3P averages 1,101 chill hours per winter (8921,336 across 10 years) in USDA zone 4a.
P3P climate
Average chill hours1,101 (892–1,336 across 10 winters)
USDA hardiness zone4a (NRCan zone 4a)
Last spring frosttypically May 7 – May 19
First fall frosttypically October 13 – October 24

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 P3P’s chill hours and zone:

How many chill hours does P3P get?
P3P averages 1101 chill hours per winter, ranging from 892 to 1336 across the last 10 years.
What hardiness zone is P3P?
P3P is in USDA hardiness zone 4a.

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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