The zone number which we give is the northernmost 

 zone in which we believe the plant to be hardy under ave- 

 rage winter conditions. It should be noted that a plant's 

 ability to survive the winter is not determined solely by 

 the minimum temperature to which the plant is exposed 

 but is also affected by the plant's general health, the soil 

 moisture content, and the exposure to scalding sun and 

 wind. Our assignment of a particular zone number to a 

 plant should not be construed as a guarantee that the plant 

 will survive in that zone. We can make no warranty, ex- 

 pressed or implied, as to the abilitx' of any plant to survive 

 after it has left this nurser\'. 



