What plant hardiness zone is Porrentruy

Porrentruy is located at Porrentruy, Jura (JU), Switzerland.

Plant hardiness zone (winter frost zone or gardening zone) for Porrentruy 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 Porrentruy 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.

Porrentruy @ wikipedia.

* The lowest temperature in Porrentruy was -19.4 °C on 05/02/2012.