The kind of plants you can grow have changed slightly in most regions of Canada according to the federal government’s latest ...

I ask because the U.S. Department of Agriculture has revised its map of plant hardiness zones, causing a lot of excitement among gardeners, who are the largest users of zone classifications.

This first map used climate normals from 1930-1960. The map was updated once before by simply using updated climate normals (1961-1990).

The new map reflects that many areas have become warmer since 1990, when the previous USDA hardiness zone map was published. Significant portions of many states have shifted a least one full zone ...

The U.S. Department of Agriculture hardiness zone map was developed in the 1960s and modified in the early ’90s. In London, we are in Zone 5a, which means we can grow most plants from zones 3 ...