Zone 6
Zone 7
Zone 7 1/2
Zone 8
Zone 9
Zone 9 1/2
Zone 10
Kaitaia
Dargaville
-23o to -18o C
-18o to -12o C
-15o to -9o C
-12o to -7o C
-7o to -1o C
-4o to -1o C
above -1o C
Auckland
Picton
Nelson
Westport
Blenheim
Greymouth
Hokitika
Hamilton
Tauranga
Christchurch
Rotorua
Haast
Taupo
Gisborne
New Plymouth
Napier
Timaru
Queenstown
Oamaru
Hardiness Map. USDA
Dunedin
Palmerston North
Invercargill
Wellington
Key to Plant Hardiness
The Plant hardiness rating is
based on the zoneal table in
the appropriate range of
annual minimum temperature
for each zone.