LETTUCE 
Buy with Confidence 
Lettuce 
New York No. 415 
ICEBERG VARIETIES 
CultuiQ: Conditions necessary to grow good head lettuce 
are rich soil, plenty of moisture, and steady growth from 
the time the seeds are planted until the heads are ready to 
use. A check in growth from lack of nourishment, mois¬ 
ture or adverse conditions, usually results in total or par¬ 
tial crop failure. 
After the soil is thoroughly plowed and prepared, drill 
in rows on a compact seed bed two feet apart, planting 
seed one-half to one inch deep, and from one-half to one 
pound of seed to the acre. Two weeks after it comes up 
it is usually large enough to be thinned to single plants 
to a distance of at least 14 inches. Keep crop clean of 
weeds at all times. Cultivate thoroughly but not deep. 
Ground should not become dry but care must be used in 
irrigating. When weather is cold use water very sparingly. 
as crop can be stunted by too much water. If the weather 
is inclined to be a little too warm, it is possible at times 
to save the crop by an abundance of water. This crop 
requires from 75 to 97 days for maturity from seeding 
time to harvest. 
NEW YORK STRAIN—IMPERIAL STRAIN 
In the breeding work of the Iceberg or crisp headed 
varieties of lettuce, two distinct strains have been devel¬ 
oped or segregated. That is, the New York strain and 
the Imperial strain. In growing head lettuce the first thing 
to decide is whether you wish to plant the New York 
strains or the Imperial strains. This decision must depend 
on the time of the year or season when you wish the crop 
to mature and your climatic conditions. 
Imperial strains are more disease resistant to mildew, 
root and stem rot, give the largest per cent of solid heads, 
but more susceptible to tipburn and slime than are the 
New York strains. Of the Imperial strains 815, I-H Im¬ 
proved, and 847 are best suited for Colorado. 
New York strains are the earliest, are less apt to slime 
or tipburn, produce the larger per cent of good marketable 
heads during warm weather, than do the Imperial strain. 
New Yorks do better than Imperials for heading during 
July, August and early September. Of the New Yorks, 315, 
415, and 915 are best suited for Colorado. 
In the past few years the development and introduction 
of new varieties has been so fast that but few seed houses 
or planters have been able to keep up with the progress. 
We have devoted a large acreage in the mountains of 
Colorado—on our farm south of Denver; also in Arizona 
and California, to the trials and development of new 
varieties and strains. We carry in stock and offer to our 
customers only those varieties which we have found best. 
This year we are pleased to offer a new outstanding New 
York strain. No. 915. 
WE RECOMMEND 
For Arizona—I-H Improved 847 and 152, outstanding 
for planting crops to mature in the fall, November and 
December. 
Early spring crop, March and early April, Imperial D 
and No. 615. 
For spring crops, 847 and 152, but for late spring crop 
best of all Nos. 315 and 915. 
For Imperial Valley, California—We recommend Im¬ 
perial D, No. 13, and Imperial 615. 
For Salinas Valley, California—We recommend No. 152, 
415, 847. 
For Colorado—Vicinity of Denver: For starting in beds 
and transplanting to fields Nos. 315 and 915. For early 
summer (June) No. 815 first, then I-H. For late June and 
early July, 415 and 915. Fall crop 815 and 615. For main 
crop in mountains of Colorado, 315, 415, 815 and 915. See 
descriptions. 
New York Nos. 315 and 415. These two recent introduc¬ 
tions are quite similar, but under identical conditions 
315 will produce a larger head than 415. Both were es¬ 
pecially bred to produce good solid heads during warmer 
weather. We especially recommend these varieties in 
place of Nos. 12 and 515, because they are surer to make 
heads of better quality, less ribby, less slime and tipburn. 
Price: Pkt., 10c; oz., 20c; Vi lb., 55c; Vz HJm 90c; lb., 
$1.60; 5 lbs., $7.50. 
New York 915. The latest development. Our 1939 intro¬ 
duction. With most varieties it is often difficult to 
produce a large per cent of good number one marketable 
heads of lettuce during warm weather, especially if you 
have showers at about heading time which causes the 
heads to often loosen up if they are of the New York 
varieties, and tipburn and slime if of the Imperial 
varieties. So the aim of lettuce breeders is to develop 
a New York variety that will form a large per cent of 
solid heads, and to develop an Imperial variety that is 
less apt to tipburn and slime. In 915 we think we have 
both. Pkt., 10c; oz., 25c; 1/4 lb., 75c; V 2 lb., $1.35; 
lb., $2.25; 5 lbs., $10.00. 
imperial No. 815. A very sturdy, robust variety with 
large heavy leaves of very dark green color which we 
recommend for early planting. This strain is more re¬ 
sistant to blight, mildew, and root rot. And in cool 
weather it is not as susceptible to tipburn. It produces 
good size, fine appearing heads and the percentage of 
solid matured heads that can be cut from a field comes 
near to our I-H Improved than any other variety. Pkt., 
10c; oz., 20c; 1/4 lb., 75c; 1/2 lb., $1.15; lb., $2.00; 10 lbs., 
$17.00. 
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