’ . OF tie 
a NG r ee. 
3 Seep ae 

Map of Climatic Zones from Manuai of Cultivated Frees and Shrubs by Alfred Rehder 
of Arnold Arboretum. The figures at ends of lines separating the zones show lowest 
average temperatures of the coldest single month on record. Look at page 6 and you 
will appreciate how elevation, air drainage, water bodies and other local conditions 
may have much influence in affecting the way trees will survive in particular locations. 
Therefore this map is only an approximate guide. The heavy line (170) marks average 
length of frost free season of 170 days. Lewisburg, Pa., is just above it on the Susque- 
hanna River. Note this line again near Great Lakes. Remember that this line is an 
average. Some seasons are shorter and some are longer. In Pennsylvania, a careful 
study of the records shows that in one-fourth of the years the growing season is three 
weeks longer than the average. That fact makes it possible for a Pecan tree to come 
through with an occasional crop much farther north than it can be depended upon to 
ripen its nuts. But it is an ornament every year. So is every other tree on our list. 
ThecNortherni Pecan Many think of the Pecan as a southern 
tree because trees producing fine nuts 
tinguished landmark, plant two balanced beer peer aenied in the South and the in- 
Pecan trees of the same variety and give dustry started in the Cotton Belt. But 
them a chance. I have seen these trees the Pecan tree grows wild and ripens its 
towering thirty feet above the tops of the nuts in southeastern Iowa, in south- 
oak for ests in Indiana. I have seen them western Ohio, and thence downstream to 
six feet in diameter, with more than 100 the Gulf of Mexico. George Washington 
feet spread. They are truly lordly trees, (ajjed them “Illinois nuts” because the 
and will bear nuts for centuries. One 614, he had came from Illinois. He is said 
particular tree in southern Illinois WaS to have been very fond of them, often 
poate x heniche irstow tite, man saw carried them in his pocket and ate them 
it in 1817. It is reported that it only 5 Sapir hat 
: . at unexpected times. His diary reports the 
Bane ote a ne eet ee planting of these nuts, and the trees he 
and it is still going strong. Ordinarily : 
Pecan trees, like most apple trees, alter- planted at Mount Vernon are still 
nate their heavy and light crops. thriving. 
If you want to make your place a dis- 
—NI 
