What plant hardiness zone is Castiglione d'Orcia

Castiglione d'Orcia is located at Siena, Tuscany (Toscana), Italy.

Plant hardiness zone (winter frost zone or gardening zone) for Castiglione d'Orcia is 8b by the USDA scale.

Coldest zone's winter temperature is −9.4 … −6.7 °C.

Plants of 8b USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 8b USDA.

Alternative climatic zone of gardening for Castiglione d'Orcia by UK RHS scale is H4.

Plants of H4 RHS hardiness zone suitable for outdoor gardening and growing in this winter frost zone H4 RHS.

Castiglione d'Orcia @ wikipedia.

* The lowest temperature in Castiglione d'Orcia was -9.2 °C on 28/02/2018.