What plant hardiness zone is Ostrołęka

Ostrołęka is located at Masovia, mazowieckie, Poland.

Plant hardiness zone (winter frost zone or gardening zone) for Ostrołęka is 5b by the USDA scale.

Coldest zone's winter temperature is −26.1 … −23.3 °C.

Plants of 5b USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 5b USDA.

Alternative climatic zone of gardening for Ostrołęka by UK RHS scale is H7.

Plants of H7 RHS hardiness zone suitable for outdoor gardening and growing in this winter frost zone H7 RHS.

Ostrołęka @ wikipedia.

* The lowest temperature in Ostrołęka was -25.1 °C on 03/02/2012.