What plant hardiness zone is Rossa

Rossa is located at Moesa, Graubünden (Grisons) (GR), Switzerland.

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

Rossa GR @ wikipedia.

* The lowest temperature in Rossa was -17 °C on 06/02/2012.