atic city 
THE LIMITS OF THE 
AVERAGE ANNUAL MINIMUM 
TEMPERATURES FOR EACH ZONE | | 
: Zonet {nm Northern Canada 
Zone 2-50? to -35 GE 
HARDINESS MAP . Zone 3 -35° to -20° tama 
~ ‘ Zone 4 -20° to -10° 
These zones are based on average annual minimum Zone 5 -10° to ~ 5° 
temperatures as listed by the U. S. Weather Bureau : Zone 6 -5° to #5° & 
for the years 1895-1935 and published in the Atlas. , : he es C ae to 
of American Agriculture, U. S.D, A.,Washington, 1946 le, 3 20° o 
: Zone 10 30° to 
HOW TO ae THIS MAP 
From it determine what Roney OUsate in. Every item 
carrying your zone numbe? 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 will probably be hopeless. 
For full explanation of the entire system see Page I. 
