THE LIMITS OF THE 
AVERAGE ANNUAL MINIMUM | 
TEMPERATURES FOR EACH ZONE : 
gone t {in Northern Canada 
: : Zone 2-50° to -35 BEEg 
HARDINESS MAP _. bo {| Zone 3-35° to -20° cee 
: 4 dene 4 -20° to -[0° ERESS 
These zones are based on average annual minimum jr. : — , | one 5 “10° to - 5° ee 
temperatures as listed by the U. S. Weather Bureau ; — : ~ 1 gre 6 -5 to 
for the years 1895-1935. and ee in the Atlas . ee Zone? 5° to 
of American ee U.S.D. A., Washington, 1946 : : : arr done 8 10° to 
: : : : done 9 20° to 
: Zone 10 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 onthose rated 
one zone greater, there is alt least a chance for success 
but two zones greater will probably be hopeless. 
For full explanation of the entire system see Page I. 
