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THE LIMITS OF THE 
AVERAGE ANNUAL MINIMUM 
TEMPERATURES FOR EACH ZONE 
- €0ne ? th Norther: Canads 
Zone FSO" te -~35- 
Zone 3.-35° to -20°- Eee 
fone 4-20° to -10° Ee 
done 5-10’ to - 5° ae 
Zone 6 -5° to #8° Gea 
Zone? §° to 10° Beep 
Jone 8 10° to 20° Same 
Zone 9 20° to 3 : 
Zone 10 30° to 






: HARDINESS MAP _ 
These zones are based on average annual minimum 
temperatures as listed by the U.S. Weather Bureau 
for the years 1895-1935 and gies inthe Atlas 
of American Agriculture, U. S.D, A., Washington, i946 
















HOW TO USE THIS MAP 
From it determine what jone you are in. Every item 
carrying your zone numbeyor a smaller number should 
be hardywith you. If you want togamble on those rated 7 
one zone greater, there is at least a chance for success 
but two zones greater will probably be hopeless. 
For full explanation of the entire system see Page I. 
