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Chill hours in P3L

The short answer

P3L averages 1,138 chill hours per winter (9211,447 across 10 years) in USDA zone 4b.
P3L climate
Average chill hours1,138 (921–1,447 across 10 winters)
USDA hardiness zone4b (NRCan zone 4b)
Last spring frosttypically April 29 – May 17
First fall frosttypically October 17 – October 31

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 P3L’s chill hours and zone:

How many chill hours does P3L get?
P3L averages 1138 chill hours per winter, ranging from 921 to 1447 across the last 10 years.
What hardiness zone is P3L?
P3L 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