WINTER HARDY/ZONALITY
Winter hardiness / zonality data show the lowest temperature (measured in °C), that a given plant canwithstand without further damage.
| Zone | Temperature in °C | Notes |
| Z1 | < to - 45,5 | |
| Z2 | from - 45,5 to - 40,1 | |
| Z3 | from - 40,0 to -34,4 | |
| Z4 | from - 34,3 to -28,9 | |
| Z5 | from - 28,8 to -23,4 | |
| Z6 | from - 23,3 to -17,8 | Need some winter protection in areas not covered with snow. |
| Z7 | from - 17,7 to -12,3 | Need some winter protection in areas not covered with snow. |
| Z8 | from - 12,2 to -6,7 | Covering with leaf mold, even just a heap o leaves or twings to provide crucial insulation for the plants is essential. |
| Z9 | from - 6,6 to -1,2 | Winter protection with thick leaf mold or geotextile, or possibly put it in a cold bed. |
| Z10 | from - 1,1 to +4,4 | Protect your plants in winter by putting it in a frost-free greenhouse or a wintergarden. |
| Z11 | from +4,5 to +40,0 | If possible, put the plant in the house or in a winter garden above 12°C. |
The temperature data and zones show non the zoning map are based on measurements that give the lowest
average winter temperature in the area with an 80% probability.
