Interactive United Kingdom and Ireland Gardening and Plant Hardiness Zone Map

Based on the USDA Hardiness Zone Map, this interactive version covers the UK and Ireland using USDA hardiness zone classifications.

USDA Zone 7a

-17.8°C to -15°C

USDA Zone 7b

-15°C to -12.2°C

USDA Zone 8a

-12.2°C to -9.4°C

USDA Zone 8b

-9.4°C to -6.7°C

USDA Zone 9a

-6.7°C to -3.9°C

USDA Zone 9b

-3.9°C to -1.1 °C

USDA Zone 10a

-1.1 °C to 1.7°C

What are Hardiness Zones, Gardening Zones, Growing Zones and Plant Zones?

Hardiness Zones, Gardening Zones, Growing Zones and Plant Zones refer to defined geographic regions that can support specific plants, flowers and trees. The zones define a minimum range of temperatures that a plant or tree can survive safely in that zone. The most commonly used Hardiness Zones were defined by the USDA.

View the Fahrenheit UK Hardiness Zone Map
Interactive Map of Average Last Frost in the United Kingdom