What plant hardiness zone is Les Clefs

Les Clefs is located at Haute-Savoie, Auvergne-Rhône-Alpes (ARA), France.

Plant hardiness zone (winter frost zone or gardening zone) for Les Clefs 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 Les Clefs 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.

Les Clefs @ wikipedia.

* The lowest temperature in Les Clefs was -17.9 °C on 27/02/2018.