What plant hardiness zone is Drei Höfe

Drei Höfe is located at Wasseramt, Solothurn (Soleure) (SO), Switzerland.

Plant hardiness zone (winter frost zone or gardening zone) for Drei Höfe is 6b by the USDA scale.

Coldest zone's winter temperature is −20.6 … −17.8 °C.

Plants of 6b USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 6b USDA.

Alternative climatic zone of gardening for Drei Höfe by UK RHS scale is H6.

Plants of H6 RHS hardiness zone suitable for outdoor gardening and growing in this winter frost zone H6 RHS.

Drei Höfe @ wikipedia.

* The lowest temperature in Drei Höfe was -19.8 °C on 05/02/2012.