The USDA plant hardiness map is created and updated every few years by the U.S. Department of Agriculture. It divides North America into eleven zones by minimum average annual temperatures. The lower the number is, the lower the temperatures in that zone. Each zone represents ten degrees of temperature difference.
How do hardiness zones work?
The USDA plant hardiness map is created and updated every few years by the U.S. Department of Agriculture. It divides North America into eleven zones by minimum average annual temperatures. The lower the number is, the lower the temperatures in that zone. Each zone represents ten degrees of temperature difference.
What are the growing zones in Canada?
- Vancouver: 8b.
- Victoria: 9b.
- Kelowna: 7a.
- Edmonton: 4a.
- Calgary: 4a.
- Saskatoon: 3b.
- Winnipeg: 4a.
- Toronto: 7a.
