What plant hardiness zone is Tschiertschen-Praden

Tschiertschen-Praden is located at Plessur, Graubünden (Grisons) (GR), Switzerland.

Plant hardiness zone (winter frost zone or gardening zone) for Tschiertschen-Praden 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 Tschiertschen-Praden 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.

Tschiertschen-Praden @ wikipedia.

* The lowest temperature in Tschiertschen-Praden was -18.7 °C on 06/02/2012.