What plant hardiness zone is Koblenz

Koblenz is located at Zurzach, Aargau (Argovia) (AG), Switzerland.

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

Koblenz, Switzerland @ wikipedia.

* The lowest temperature in Koblenz was -19.5 °C on 04/02/2012.