allotment86:

European hardiness zones.

The map can be used as a guideline for deciding how well a plant will survive the winter throughout the continent.

The zones numbered 1 through 10 correspond exactly to the same zone numbers on the USDA’s (U.S. Department of Agriculture) hardiness zone map for North America.

This map is courtesy of www.ulmer.de   via   Sequim rare plants.

Almost ya’ll you europeans are spoiled rotten with such mild growing zones.