Natural Resources Canada is working on the first update to its plant hardiness zones map since 2014, hoping to have the map – which gardeners rely on when determining what plants will thrive in ...

A hardiness zone is a geographic area with a similar average minimum temperature. The map is based on the average annual extreme minimum temperature, so people in those areas know which plants can ...

In the news recently, the U.S. Department of Agriculture revised its plant hardiness zone map for the first time in more than a decade. As always, this is a hot topic in horticultural circles.