What plant hardiness zone is Grotte di Castro

Grotte di Castro is located at Viterbo, Lazio, Italy.

Plant hardiness zone (winter frost zone or gardening zone) for Grotte di Castro 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 Grotte di Castro 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.

Grotte di Castro @ wikipedia.

* The lowest temperature in Grotte di Castro was -8.5 °C on 28/02/2018.