What plant hardiness zone is Grafendorf bei Hartberg

Grafendorf bei Hartberg is located at Hartberg-Fürstenfeld, Styria (Steiermark) (STM), Austria.

Plant hardiness zone (winter frost zone or gardening zone) for Grafendorf bei Hartberg 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 Grafendorf bei Hartberg 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.

Grafendorf bei Hartberg @ wikipedia.

* The lowest temperature in Grafendorf bei Hartberg was -18.2 °C on 01/03/2018.