Winter Hardiness Map Selecting the right perennials suited for you and your customers climate is the key to success. The European winter hardiness map divides Europe into 11 temperature zones, ranging from -45°C to +4°C. In this catalogue, you will find the winter hardiness zone for each perennial. The classification shows in which European areas the perennials are winter hardy and will survive over winter in the (consumers) garden. It also helps to make the decision whether to cultivate a perennial in a greenhouse or outside.
1 < -45 2 -45
5 -28 6 -23 7 -17 8 -12
- -23 - -17 - -12
9 -6 10 -1
- -1 - +5
- -40 - -34 - -28
3 -40 4 -34
11 > +5
- -6
Source: USDA zones
Reykjavík
Glasgow
Dublin
Birmin
London
Orléa Renn
Santander
León
Madrid
Lisboa
Sevilla
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