"HARDINESS MAP 
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Mining RO Siaue aokoud 
ijgees yy | yy ge : 
LL sg OWL 
ys ees : Ce ee oe 
THE LIMITS OF THE 
AVERAGE ANNUAL MINIMUM 
TEMPERATURES FOR EACH ZONE 
; j Zone 1 {In Northern Canada 
a ‘ =o he ° Croosancia \ = Zone 250° to -35 
HARDINESS MAP. f - SF L mg ne Zone $=35° to -20° Bag 
oe r Zone 4 -20° to -[0° Eg 
These zones are based on average annual minimum : ; . A PP q Zone 510° to - 5° eee 
temperatures as listed by the U.S. Weather Bureau ae > Zone 6 -5° to +5° : 
for the years 1895-1935 and published in the Atlas Be ae 
of American Agriculture, V. S D. A., Washington, [936 ; oak os . ee pa 
Zone 10. 30° to 40° ee 



HOW TO USE THIS MAP 
From it determine what done you are in. Every item 
carrying your zone numbed 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. 
