What plant hardiness zone is Saint-Louis

Saint-Louis is located at Haut-Rhin, Grand Est (GES), France.

Plant hardiness zone (winter frost zone or gardening zone) for Saint-Louis 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 Saint-Louis 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.

Saint-Louis, Haut-Rhin @ wikipedia.

* The lowest temperature in Saint-Louis was -20 °C on 04/02/2012.