Poland
- 5a
- 5b
- 6a
- 6b
- 7a
- 7b
Hardiness
USDA hardiness zones
Illustrative USDA zone maps for Poland, Germany, Czechia, Slovakia, Switzerland, Austria, the USA and Canada — divided into regions, with a colour scale from the coldest to the warmest zone.
USDA zones indicate the minimum winter temperatures and help you assess whether a plant can safely overwinter in a given region.
Zone scale (cold → warm)
- 3a
- 3b
- 4a
- 4b
- 5a
- 5b
- 6a
- 6b
- 7a
- 7b
- 8a
- 8b
- 9a
Country maps
Germany
- 6a
- 7a
- 7b
- 8a
Czechia
- 5a
- 6b
- 7a
Slovakia
- 5a
- 6b
- 7a
- 7b
Switzerland
- 4a
- 5a
- 7a
- 8a
- 8b
Austria
- 5a
- 6b
- 7a
- 7b
USA
- 4b
- 6a
- 7b
- 8b
- 9a
Canada
- 3a
- 3b
- 5b
- 8a
How to read the map
Each colour is one USDA zone — the warmer it is, the milder the winters. Find your region on the country map, read off the zone, then check a plant page for its “USDA min–max” range. If your zone falls within the plant’s range, it can overwinter outdoors in your region.
Illustrative map — approximate zones
Country outlines are real (simplified), but the zone division is an editorial simplification — the bands approximate reality, and local conditions (altitude, basins, urban heat) can differ by a zone. Treat the map as a guide, not a precise source.