abd zona değerleri karşılıkları,
USDA Zones
Zone Celsius [°C] Fahrenheit [°F] Example Cities
0 Below -50 C Below -60 F Verkhoyansk, Russia
1 -45 to -50 C -50 to -60 F Fairbanks, Alaska; Yakutsk, Russia
2a -43 to -45 C -50 to -45 F Prudhoe Bay, Alaska; Irkutsk, Russia
2b -40 to -43 C -45 to -40 F Novosibirsk, Russia; Pinecreek, Minnesota
3a -37 to -40 C -40 to -35 F Omsk, Russia; St. Michael, Alaska
3b -34 to -37 C -35 to -30 F Yekatarinburg, Russia; Tomahawk, Wisconsin
4a -32 to -34 C -30 to -25 F Kazan, Russia; Minneapolis/St.Paul, Minnesota
4b -29 to -32 C -25 to -20 F Moscow, Russia; Northwood, Iowa
5a -26 to -29 C -20 to -15 F St Peterburg, Russia; Des Moines, Iowa
5b -23 to -26 C -15 to -10 F Helsinki, Finland; Columbia, Missouri
6a -20 to -23 C -10 to -5 F Stockholm, Sweden; St. Louis, Missouri
6b -18 to -20 C -5 to 0 F Berlin, Germany; Branson, Missouri; Beijing, China
7a -15 to -18 C 0 to 5 F København, Denmark; South Boston, Virginia; Xi'an, China
7b -12 to -15 C 5 to 10 F Amsterdam, Netherlands; Griffin, Georgia
8a -9 to -12 C 10 to 15 F Paris, France; Dallas, Texas
8b -7 to -9 C 15 to 20 F Istanbul, Turkey; Gainesville, Florida; Tokyo, Japan
9a -4 to -7 C 20 to 25 F London, England; St. Augustine, Florida; Shanghai, China
9b -1 to -4 C 25 to 30 F Rome, Italy; Brownsville, Texas; Osaka, Japan
10a 2 to -1 C 30 to 35 F Lisbon, Portugal; Victorville, California; Melbourne, Australia
10b 4 to 2 C 35 to 40 F Auckland, New Zealand; Coral Gables, Florida; Guangzhou (Canton), China
11 above 4 C above 40 F Santa Cruz, Tenerife; Mazatlan, Mexico; Brisbane, Australia
http://www.gardenology.org/wiki/Hardiness_zone