HARDI NESS MAP 
O Sioux Lookout 
ginte Marie 
Sault S 
THE LIMITS OF THE 
AVERAGE ANNUAL MINIMUM 
TEMPERATURES FOR EACH ZONE 
Zone { {mn Northern Canada 
Zone 2-50° to -35 SExy 
Zone 3-35° to -20° faze 
Zone 4 -20° to -{0° 3 
Zone 5-10° to - 5° Ee 
Zone 6 -5° to +5° EREeS 
Zone? 5° to 10° SatmEe 
Zone $§ 10° to 20° Same 
Zone 9 20° toe 30° 
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 published in the Atlas 
of American Agriculture, U.S.D.A.,.Washington, 1946 
HOW TO USE THIS MAP 
From it determine what zone you are in. Every item 
carrying your zone numbenor asmaller 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 will probably be hopeless. 
For full explanation of the entire system see Page I. 
