What plant hardiness zone is Saint-Martin

Saint-Martin is located at Hérens, Valais (Wallis) (VS), Switzerland.

Plant hardiness zone (winter frost zone or gardening zone) for Saint-Martin is 6a by the USDA scale.

Coldest zone's winter temperature is −23.3 … −20.6 °C.

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

Alternative climatic zone of gardening for Saint-Martin by UK RHS scale is H7.

Plants of H7 RHS hardiness zone suitable for outdoor gardening and growing in this winter frost zone H7 RHS.

Saint-Martin, Valais @ wikipedia.

* The lowest temperature in Saint-Martin was -22.7 °C on 27/02/2018.