4 MODERN STRAWBERRY GROWING 
can, or cannot, withstand the long cold of 
the North or the frosts (both early and 
late), or they cannot stand the exces- 
sive heat or sunlight of the South or mid- 
South. : 
This adaptability is not surprising, since 
we recognize such things as “‘plant associa- 
tions” or ‘“‘societies” in which a certain 
group of plants live together under certain 
conditions of climate, moisture and other 
factors. And it has been found that by selec- 
tion and breeding, or both, either natural 
or artificial, it is possible to change the 
requirements of a plant so that it is more 
adapted to a condition of cold weather than 
it is to hot weather, or vice versa; or it has 
changed its characteristic choice for great 
moisture to a liking for drier conditions; or 
in some other way it has been so modified 
that it can and does live under different 
environment ‘or surroundings than it re- 
quired in earlier stages of its develop- 
ment. 
Applying this idea to strawberry plants 
originating in the South: They can be 
brought North, and in a few years their 
descendants will be, or can be made to be, 
