| Zone 0a -70°F to -65°F | Zone 0b -65°F to -60°F | Zone 1a -60°F to -55°F | Zone 1b -55°F to -50°F | Zone 2a -50°F to -45°F |
| Zone 2b -45°F to -40°F | Zone 3a -40°F to -35°F | Zone 3b -35°F to -30°F | Zone 4a -30°F to -25°F | Zone 4b -25°F to -20°F |
Based on the USDA Hardiness Zone Map Designations, this interactive version covers the Province of Alberta which ranges from USDA Zone 0a to USDA Zone 5a. What are Hardiness Zones, Gardening Zones, Growing Zones and Plant Zones? Hardiness Zones, Gardening Zones, Growing Zones and Plant Zones refer to defined geographic regions that can support specific plants, flowers and trees. T he zones define a minimum range of temperatures that a plant or tree can survive safely in that zone.