About 80 per cent of Canada's land mass saw an increase in its plant hardiness zone, mostly of about half a zone to one full zone.

The importance of hardiness zones lies in their ability to help gardeners and farmers choose plants that will thrive in their specific region.

New plant hardiness zone map impacts gardening The USDA’s winter hardiness zone map has long been the standard used by home gardeners, plant breeders and researchers to determine which plants ...

While sun-loving edibles are plentiful, a handful of vegetables prefer the cool protection of shadier sites, particularly for ...

Plant hardiness zones have long been a useful guideline for determining if what you're planting in your yard can handle cold temperatures.

How important is it to refer to the hardiness zones I see listed for plants I would like to try in my garden? — Alicia Anderson, Highland Park Choosing plants that are well-suited to the local ...

The United States is divided into 13 different plant hardiness zones, each with "A" and "B" subdivisions. This is a number assigned to a plant that tells you how cold of a temperature the plant ...

The "different" hardiness zones you have asked about are probably the published U.S. Dept. of Agriculture (USDA) plant hardiness zone scale that runs from 1 to 13.

With the recent development of an enhanced Plant Hardiness Zone Map, the United States Department of Agriculture (USDA) has provided farmers and gardeners a more accurate guide to planting in ...

The USDA published its first Plant Hardiness Zone map in 1960 making 10 hardiness zones in the United States based upon 10 degree Fahrenheit gradients. Then, in 1990 a major overhaul of the map ...

You will often see the hardiness zones listed after a plant name in catalogs, books and magazines, such as Hydrangea 'Forever Pink' (Hydrangea macrophylla 'Penny Mac') Zones 5-9.

While about 80 million American gardeners, as well as those who grow and breed plants, are the largest users of the USDA Plant Hardiness Zone Map, many others need this hardiness zone information.