316 VEGETABLE FORCING 
pecially if fresh horse manure is to be applied as a mulch 
after the plants have grown to a height of several fect. 
Planting distances.—There are three distinct systems 
of training cucumbers, and the proper spacing of the 
plants in the beds will depend mainly on the plan to be 
followed. 
When the upright 
system is used (Figs. 
110, 111 and 112), 
the space between 
rows varies with dif- 
ferent growers from 
2 to 4% feet, and the 
distance between 
plants in the rows 
ranges from 10 
inches to 2 feet. A 
prominent Boston 
grower plants 2 by 
4+ feet apart, another 
16 inches by 4 feet, 
and a third grower 
12 inches by 4 feet, 
so that uniform 
planting distances 
are not followed in 
any particular forc- 
ing district. A 
grower at Cleveland, 
Fig. 112.— Single stem cucumber training. ‘ ‘ 
Note how the plant has been twined about the Ohio, plants 18 inches 
string. 
by 4 feet, one at New 
Castle, Pa., 15 inches by 4 feet, another at Erie, Pa., 2 
feet by 3 feet, and another at Toledo, Ohio, 16 inches by 
4 feet. When two plants are grown in each pot, the 
tendency is to allow more space between the pairs of 
plants, though the average distance between plants may 
be about the same as when they are planted singly. As 
