









_ temperatures as listed srean 
for the years 1895-1935 and ished in the Atlas 
D. A., Washington, 1936 _ 
ee 
of American Agriculture, 
” THE LIMITS OF THE 
AVERAGE ANNUAL MINIMUM 
TEMPERATURES FOR EACH ZONE 

Zone {| {nm Northern Canada 
Zone 2-50? to 
Zone 3 ~-358° to 
Zone 4 -20° to 
Zéne-5 -10° to 
Zone 6 -5° to 
Zone 7. 5° to 
Zone 8 10° to 
Zone 2 20°-te 
Zone10 30° to 





HOW TO USE THIS MAP 
From it determine what zone you are in. Every item carrying your zone 
number or a smaller number should be hardy with you. If you want to 
gamble on those rated one zone greater, there is at least a chance for 
SUCCESS, but two zones greater wil probably be hopeless. 
For full explanation of the entire system see inside of the front cover. 
16 17 


20°: en 
-10° te 
et 5° ptier 
$5° 
10° fg 
20° Gas 
50° 
40° Bag 



