What plant hardiness zone is Montalto di Castro

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

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

Montalto di Castro @ wikipedia.

* The lowest temperature in Montalto di Castro was -7.3 °C on 28/02/2018.