Canadian Plant Hardiness Map by Zones
Plants grow and thrive in many different climates. If a plant is considered an annual or perennial for your area, that is dependent on the cold climate of winter your garden will experience. When adding plants to your garden, it is important to be aware of your zone and the plant hardiness zone. Plant hardiness zones range from 1 to 9. Zone 1 plants are the hardiest and able to withstand winter temperatures of -46 °C (below -50 °F).
- Zone 0: below -46°C
- Zone 1: -46°C
- Zone 2: -46°C to -40°C
- Zone 3: -40°C to -35°C
- Zone 4: -35°C to -29°C
- Zone 5: -29°C to -23°C
- Zone 6: -23°C to -18°C
- Zone 7: -18°C to -12°C
- Zone 8: -12°C to -7°C
- Zone 9: -7°C to -1°C
For example: if you live in a zone 5 area what that means is varieties that plants hardy in zone 5-9 or lower like 2-9 will be winter hardy for your area. If you are in a zone 3 then plants that are noted a zone 5 or 6 will need dug up in the fall and brought to a protected area over winter.
Keep in mind that in any region there can be microclimates and protection from structures like homes, fences and sheds increase the improve the cold temperature resiliency of plants.
This Canadian plant hardiness map indicates where various types of trees, shrubs and flowers will most likely survive. It is based on the average climatic conditions of each area.
To view a full interactive version of this map, and to learn which zone you reside in, visit the Natural Resources Canada Plant Hardiness website.