








"THE LIMITS OF THE 
AVERAGE ANNUAL MINIMUM 
| TEMPERATURES FOR EACH ZONE. 
a 7 - ~ ~ : Zone | fr Northern Cana 
os : LL ; Zone 2-50° to 35. GEE 
HARDINESS MAP . © : : Ss : A : Zone 3-38" to -20° 
oe : oe a : : ee oe : ta ee S . : Zone 4 -20° to -10° Ee 
These zones ore based on average annual minimum fe . ee ae ee S Fone 5 -10° to 
peratures as listed by the U.S, Weather Bureau |_- : a b 44 fone 6 5° to 
e years 1895-1935 and published inthe Atlas }  . - ao — . _ Zone 7 &° to 

Zane 8 10° to 
Zone 9 20° to 
| | of American Agriculture, U. S.D. A. Washington, 1936 
- ae oe : re ets Sere ee : Foe 0 1 tc 



Mee HOW TO USE THIS MAP 
From it determine what zbdne you are in. Every item 
| carrying your zone numberor 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 inside of 
the front cover. | 

12 13 
