What plant hardiness zone is Grande-Synthe

Grande-Synthe is located at Nord, Hauts-de-France (HDF), France.

Plant hardiness zone (winter frost zone or gardening zone) for Grande-Synthe is 7b by the USDA scale.

Coldest zone's winter temperature is −15 … −12.2 °C.

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

Alternative climatic zone of gardening for Grande-Synthe by UK RHS scale is H5.

Plants of H5 RHS hardiness zone suitable for outdoor gardening and growing in this winter frost zone H5 RHS.

Grande-Synthe @ wikipedia.

* The lowest temperature in Grande-Synthe was -12.6 °C on 04/02/2012.