Cusda Growing Zones 2024. Based on the usda hardiness zone map designations, this interactive version covers the province of ontario which ranges from usda zone 0b to usda zone 7a. The new hardiness zone map released this year has been created using gis (geographic information system) to examine hardiness zones at a much finer scale than earlier maps.
Based on the usda hardiness zone map designations, this interactive version covers the province of ontario which ranges from usda zone 0b to usda zone 7a. Is about 2.5 degrees fahrenheit.