LETTUCE 
All Prices Postpaid Unless Otherwise Noted 
ICEBERG VARIETIES 
CULTURE: The foremost conditions necessary to 
grow good head lettuce are rich soil, plenty of mois- 
ture, so as to insure steady growth from the time the 
seeds are planted until the heads are ready to use. 
A check in growth from lack of nourishment, moisture 
or adverse conditions, usually results in tipburn or 
undersized heads, but the amount of water or irriga- 
tions necessary depends a great deal on the soil loca- 
tion and the variety grown. In most sections Iceberg 
is grown in double rows, although in Colorado for no 
good reason most Iceberg is grown in single rows. 
We recommend planting on beds 14 inches wide and - 
6 inches high and two rows on each bed 24 inches 
apart. Be sure beds are smooth and almost free from 
lumps. Plant seed ¥2 to 1 inch deep and from % to 
144 pounds seed per 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. From experience we have 
found that mixture of one part commercial fertilizer 
mixed with three parts pulverized manure as a side 
dressing applied shortly after lettuce has been thinned 
gives remarkable results. 
Each variety or strain of Iceberg lettuce has its 
own peculiarities or characteristics. A good lettuce 
grower takes this into consideration when he selects 
his seed and in the growing of his crop. 
NEW YORK STRAIN AND 
IMPERIAL STRAIN 
Two distinct strains of Iceberg, 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 tioburn and 
slime than are the New York strains. Of the Im- 
perial strains 815, I-H Improved 411 and 847 are 
best suited for the Rocky Mountain regions. 
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. Of the New Yorks, 315 and 
PW55 are best suited for Colorado. 
In the past few years the development and intro- 
duction 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 cus- 
tomers only those varieties which we have found 
best. 
WE RECOMMEND 
For Arizona. 152, I-H Improved and 847, out- 
standing for planting crops to mature in the fall, 
November and December. 
Early spring crop, March and early April, No. 
615. 
But for late spring crop best of all Nos. 315 and 
915. 4 
For Imperial Valley, California. We recommend 
Imperial 615. 
For Salinas Valley, California. 
Nos. 152) 415, 847. 
For Colorado. Vicinity of Denver: For starting in 
beds and transplanting to fields Nos. 12, 55 and 315. 
For early summer (June) Nos. 55, 815 and 411. For 
late June and early July, 55 and 915. Fall crop 
815, PW55 and 411. For main crop in mountains 
of Colotade 55; 315, 815 and 411 
We recommend 

NEW YORK PW 55 
NEW YORK PW55. All-America selection for 
1942. The result of 16 years’ careful selection. 
Earliest maturing ‘New York. Sure heading and 
shows considerable resistance to tipburn. Heads 
well in summer and early fall. Heads are hard, 
crisp, well rounded with a good base. After two 
years of growing No. 55 on our vegetable farms 
we give it No. 1 place for main crops in the 
mountains as well as in lower altitudes but only 
on geod, rich ground. 
(Pkt. 10c) (oz. 35c¢) (1% Ib. 85c) (12 Ib. $1.65) (Ib. 
$3.25). 
IMPERIAL NO. 411. A new introduction of the Im- 
perial strain which has proven very satisfactory 
in the Rocky Mountain section, especially when 
grown to harvest in early June or in late Septem- 
ber and October when the weather is not ex- 
tremely hot. This variety will produce a heavy 
crop of fine, solid heads but No. 411 must not be 
neglected at heading time. 
It will not stand in the field after it has matured. 
Also this variety requires less water just before 
heading than do other varieties. 
ee poe (oz. 35c) (% Ib. 90c) (1% Ib. $1.65) (Ib. 
3.25). 
ROHCO. A new introduction of the Imperial va- 
riety. .It is a selection from Imperial 615. Trials 
show it will produce more marketable heads of 
highest quality and earlier than regular 615. 
(Pkt. 15c) (oz. 30c) (1% Ib. 80c) (Ib. $2.90). 
16 THE WESTERN SEED COMPANY, DENVER, COLORADO 
