The plant hardiness map is divided into a total of 13 zones, each zone representing a 10-degrees-Fahrenheit range of temperatures.Each zone is further divided into two half zones, with each of ...

The U.S. Department of Agriculture published a new version of its well-known Plant Hardiness Zone map earlier this month, an online tool that classifies growing regions based on extremely cold ...

Use the zone map as one factor in choosing a plant. However, don’t forget to check off all the boxes on its other needs. If you’re concerned about how the new map might affect your existing ...

Plant labels, catalogs, books and websites all classify plants according to the USDA hardiness zones. On the new map, Chicago is in Zone 6 rather than the slightly colder Zone 5. The new Zone 6 ...

USDA zones are based on averages, not isolated events, and plants can be killed if the temperatures in the winter dip too low regardless of what the new map says. “The other thing on top of it ...