The USDA defines plant hardiness zones based on the coldest ... but those regions now have shifted completely into Canada. Zone 10b once covered the southern tip of mainland Florida, including ...
Knowing when to plant in specific hardiness zones is important to maximize the spring season's potential. A hardiness zone is a geographic area with a similar average minimum temperature.
Firstly, there are Canada's Plant Hardiness Zones. Used in the same way as the USDA system, and focused on low winter ...