What plant hardiness zone is Surses

Surses is located at Albula, Graubünden (Grisons) (GR), Switzerland.

Plant hardiness zone (winter frost zone or gardening zone) for Surses is 7a by the USDA scale.

Coldest zone's winter temperature is −17.8 … −15 °C.

Plants of 7a USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 7a USDA.

Alternative climatic zone of gardening for Surses 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.

Surses @ wikipedia.

* The lowest temperature in Surses was -15.1 °C on 06/02/2012.