Canada’s Plant Hardiness Zones Map: A Look at the Changes from 1991 to 2020
As we continue to witness the effects of climate change, it is important to understand how it is impacting our environment. One way to do so is by examining the changes in plant hardiness zones across Canada.
Plant hardiness zones are determined by the average annual minimum temperature in a specific region. These zones help gardeners and farmers determine which plants are most likely to thrive in their area. The higher the zone number, the warmer the climate.
In 1991, the Government of Canada released the first official Plant Hardiness Zones Map, which divided the country into nine zones. However, in 2020, a new map was released, showing significant changes in these zones.
According to the new map, the majority of Canada has shifted one zone higher, with some areas even moving up two zones. This means that many regions are now experiencing warmer temperatures than they were in 1991.
For example, parts of the Northwest Territories and Nunavut have moved from zone 0a (coldest) to zone 0b, indicating a slight increase in temperature. In contrast, southern Ontario and Quebec have moved from zone 5a to 6a, reflecting a significant rise in temperature.
These changes have been attributed to the overall increase in global temperatures, as well as local factors such as urbanization and land use changes. The rise in temperature has also led to longer growing seasons, allowing for the cultivation of new crops in previously unsuitable areas.
While these changes may seem positive for agriculture and gardening, they also have negative implications. Warmer temperatures can lead to the spread of invasive species, pests, and diseases, which can harm native plants and crops.
Furthermore, the shift in plant hardiness zones can also have economic impacts. Farmers may need to adjust their crop choices and planting schedules, while gardeners may need to rethink their landscaping plans.
It is crucial for Canadians to be aware of these changes and their potential consequences. The Government of Canada has stated that they will continue to monitor and update the Plant Hardiness Zones Map every 10 years to reflect the ongoing effects of climate change.
In conclusion, the changes in Canada’s Plant Hardiness Zones Map from 1991 to 2020 highlight the significant impact of climate change on our environment. It is essential for individuals and governments to take action to mitigate these effects and protect our natural resources.
