CATALOGUE AND PRICE LIST. 
29 
Northern Grown 
Certified Seed Potatoes 
Certified Irish Cobbler.— An excellent extra early variety, will mature in 
seven weeks from time of planting; in color pure white with deep eyes, usually of good 
cooking quality. 
Certified Improved Green Mountain.— This variety is too well known to 
require any description; it is recognized as the standard of excellence in all New England; 
white skinned, oval formed, smooth and attractive and a good yielder. 
Don't waste labor and fertilizer on poor seed. Get the best. 
Our certified seed potatoes have been carefully selected from fields 
in Aroostook County, Maine and Prince Edward Island. 
Prince Edward Island Certified Seed Potatoes have set the standard for America. 
Beginning in 1918 , when only one carload of Certified Seed Potatoes was shipped, 
the industry in Prince Edward Island has had a phenomenal growth. 
The climate of Prince Edward Island is ideal for the production of potatoes. There 
is rarely a drought, and never excessive rains. The temperature ranges from 64 to 80 
degrees, and fogs are unknown. The soil is of a red sandstone formation, naturally 
somewhat acid, free from stones and rocks, has good drainage, all of which are favorable 
and important factors. 
The potato, while widely grown in the United States on many different kinds of 
soil, does better on certain types of soils than others. 
If one were attempting to describe an ideal soil for potatoes, it would be about as 
follows: The soil should work easily and not get in poor physical condition after 
heavy rains; should be well supplied with organic matter or humus; and should be well 
drained but possess a good water-holding capacity, due to the presence of organic 
matter on the one hand and a proper proportion of the fine soil constituents, silt and 
clay, on the other. The soil should possess a good physical condition to some depth to 
enable the roots of the potato plants to enter the soil readily and allow for proper tuber 
development. 
It Pays to use 
O. & W .High Grade Potato Fertilizer 
