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

When I came to the last page, it dawned on me. Yes, indeed. In full colour, there was a map of Canada. Their catalogue designations were based on the new Canadian hardiness zone map.

The plant hardiness zone map is also not the only map they produce: there are species maps, for example; there are maps showing where 62 different species of trees are growing in Canada; and they ...

Gardening zones by the numbers Check the tag of any tree, shrub, or perennial and you’ll find a zone number. That is your guideline for how tough the plant will be.

Last updated in 2012, the new map codifies warming temperatures for Massachusetts’ planting zones. So what does that mean for gardeners as we head into another increasingly warm growing season?

It wouldn't be good to plant a tropical plant in the northern part of the country, where the minimum average temperature can drop as low as -20 degrees when that kind of plant needs at least 40 ...