What plant hardiness zone is Colleretto Giacosa

Colleretto Giacosa is located at Turin, Piedmont (Piemonte), Italy.

Plant hardiness zone (winter frost zone or gardening zone) for Colleretto Giacosa 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 Colleretto Giacosa 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.

Colleretto Giacosa @ wikipedia.

* The lowest temperature in Colleretto Giacosa was -18.4 °C on 06/02/2012.