Maine-Grown Certified Seed Potatoes 
"Potatoes" 
Were introduced into New England by some immi¬ 
grants from the North of Ireland in 1718 and were first 
raised in the garden of Nathanial Walker of Andover, 
Mass. 
Our potatoes are produced in Northern Maine, and 
Certified Seed carries the blue certification tag of that 
State. 
Culture: Cut the seed into pieces, having 2 or 3 eyes. 
Plant in furrows 3 feet apart and 1 2 to 15 inches apart 
in the row. One peck of potatoes should be sufficient to 
plant 75 to 100 hills; 1 0 to 14 bushels are required to 
plant an acre. Potatoes do best on new soil and will re¬ 
spond generously to fertilizer applications. Cultivate by 
bringing the soil well up around the plant. Spray or dust 
the plants for insects and blight. 
POTATO PRICES 
Our potato prices are based on the market value at 
the time our catalog goes to press, and are subject to 
change without notice. This applies to both advance and 
decline. 
Green Mountain 
The Most Popular Potato in the World—Ideal for Main 
Crop—An Excellent Baking Variety— A De¬ 
pendable Winter Keeper 
A reliable medium late variety that is so popular in 
some sections that it has superseded all other main crop 
varieties. It seems to thrive in nearly all sorts of soils 
and in all locations, making heavy, healthy vines and 
yielding large crops of smooth, white-skinned tubers of 
flattish oval form. It cooks white, dry and mealy, and 
well. It keeps well and is less liable to scab and rot than 
most other varieties. Maine Certified Seed, 100 lbs., 
$2.15; 60 lbs., $1.45; 30 lbs., 80c; 15 lbs., 50c. 
Green Mountain Potatoes 
CERTIFIED CANADIAN GROWN 
Because of the persistent inquiry for Canadian grown 
potatoes for seed, we are offering for the first time, Green 
Mountain seed potatoes from Prince Edward Island, Can¬ 
ada. We believe that this seed is the best seed that 
money can buy. They are certified by the Canadian Gov¬ 
ernment, exceptionally well graded and put up in 100- 
lb. sacks. Shipment during April. Per 100-lb. sack, 
$3.00. 
Katahdin 
The Long Keeping Potato 
Originated by the U. S. Department of Agriculture 
and promising to become the outstanding late potato for 
market or storage. It was originated in Maine, by double 
crossing unnamed seedlings of Rural New Yorker No. 2 
and Aroostook Wonder parentage. It was bred for 
disease resistance, quality and yield. During the eight 
years it was under observation, it has been entirely free 
from mild Mosaic. In yields it has constantly surpassed 
Rural New Yorker or Green Mountain. The tubers are 
smooth, short, eliptical to roundish, and have few, very 
small eyes. The crisp white flesh has a distinct desirable 
cooking quality which appeals to the housewife. Maine 
Certified Seed, 100 lbs., $2.60; 60 lbs., $1.75; 30 lbs., 
95c; 15 lbs., 60c. 
Early Rose 
This is one of the oldest standard varieties of potatoes. 
It is early, the tubers are oblong and a little flat in shape 
with a flesh-colored or light pink skin. It is ready a few 
days later than the Irish Cobbler and the quality is ex¬ 
cellent. Selected stock only. 100 lbs., $2.60; 60 lbs., 
$1.75; 30 lbs., 95c; 15 lbs., 60c. 
Irish Cobblers 
An early, white-skinned variety, very short, thick, 
inclining to round. This is yearly increasing in popularity 
for the early market. Ready for market about ten days 
earlier than the Early Rose; tubers are uniformly larger 
and in average production of large crops it is not equaled 
by any of the extra early varieties, nor greatly surpassed 
in yield by any of the main crop varieties. The vine is 
very stocky and vigorous, not as liable to be affected 
with blight or to suffer by drought as most others. A 
dependable early variety. Maine Certified Seed, 100 lbs., 
$2.15; 60 lbs., $1.45; 30 lbs., 80c; 15 lbs., 50c. 
Irish Cobbler 
Raffia for Tying 
Raffia is the straw-colored inner skin of a palm found in Mada¬ 
gascar. It is very strong and tough but soft and flexible, which 
makes it the very best material for tying vegetables, plants, 
vines, etc. It is better than twine, as it does not cut the plants 
and is much stronger. It is also used for making baskets. Raffia 
comes in hanks of from 1 to 5 pounds. We offer the best grade. 
Price per pound, 30c, not postpaid. 
FORMALDEHYDE. Prevents potato diseases and in¬ 
sures a clean healthy crop. 
Directions for treatment of potatoes for common scab, 
black scurf or rhizoctonia and black leg, cold method: 
Soak the uncut tubers 1 1/2 hours in solution of one pound for¬ 
maldehyde in 30 gallons of water. If tubers are first dipped in 
or sprinkled with water, then covered with burlap sacks to keep 
them moist for a day or two before treatment, soaking period 
may be decreased to one-half hour and the effectiveness in¬ 
creased. See page 77. 
MAINE-GROWN POTATOES ARE THE STANDARD 
ROSS BROS. CO. 
