LETTUCE — Produced from Seed Supplied by 
All Prices Postpaid Unless Otherwise Noted. 

Imperial No. 815 
ICEBERG VARIETIES 
CULTURE: Conditions necessary to grow 
good head lettuce are rich soil, plenty of 
moisture, 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 con- 
ditions, usually results in tipburn or under- 
sized heads, but the amount of water or irri- 
gations necessary depends a great deal on the 
soil or ground location and the variety of 
Iceberg grown. From experience we have 
found that mixture of one part commercial 
fertilizer mixed with three parts pulverized ma- 
nure as a side dressing applied shortly after 
Lettuce has been thinned gives remarkable 
results. 
After the soil is thoroughly plowed and pre- 
pared, drill in rows on a compact seed bed 
two feet apart, planting seed one-half to one 
inch deep, and from 2 to 1 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. Culti- 
vate thoroughly but not deep. Ground should 
not become dry but care must be used in irri- 
gating. This crop requires from 75 to 97 days 
for maturity from seeding to harvest. 
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 
In the breeding work of the Iceberg or 
crisp headed varieties of lettuce, two dis- 
tinct strains have been developed or seg- 
regated. That is, the New York strain and 
the Imperial strain. In growing head let- 
tuce the first thing to decide is whether you 
wish to plant the New York strains or the 
Imperial strains. This decision must de- 
pend on the time of the year or season 
when you wish the crop: to mature and your 
climatic conditions. 
Imperial strains are more disease resist- 
ant 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 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 Im- 
perial 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 Colo- 
rado. 
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 prog- 
ress. We have devoted a large acreage 
in the mountains of Colorado—on our farm 
south of Denver; also in Arizona and Cali- 
fornia, 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. 
WE RECOMMEND 
For Arizona. 152, I-H Improved and 847, 
outstanding 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. 
For Imperial Valley, California. We rec- 
ommend Imperial 615. 
For Salinas Valley, California. 
ommend Nos. 152, 415, 847. 
For Colorado. Vicinity of Denver: For 
starting in beds and transplanting to fields 
Nos. 12, 315 and 915. For early summer 
(June) Nos. 815 and 411. For late June and 
early July, 415 and 915. Fall crop 815 and 
411. For main crop in mountains of Colo- 
rado, 315, 415, 815, 915, and 411. 
NEW YORK PW 55. All-America selec- 
tion for 1942. The result of 16 years 
careful selection. Earliest maturing New 
York. Sure heading and shows consid- 
erable resistance to tipburn. Heads well 
in summer and early fall. Heads are 
hard, crisp, well rounded with a good 
base. This is a new strain of Iceberg 
which we recommend very highly. 
(Pkt. 10c) (oz. 30c) (%4 Ib. 85c) (1% Ib. 
$1.60) (Ib. $3.00). 
IMPERIAL NO. 411. A new introduction of 
the Imperial strain which has proven 
very satisfactory in the Rocky Mountain 
section, especially when grown to har- 
vest in early June or in late September 
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 and close attention must be given 
when ready to harvest. Try No. 411, learn 
its habits. 
It will not stand in the field after it has 
matured. Heads must be cut when ready. 
Also this variety requires less water just 
before heading than do other varieties. 
Too much water and to let it stand in the 
field after heads are matured will be 
very apt to cause it to slime. 
(Pkt. 10c) (oz. 30c) (%4 Ib. 90c) (1% Ib. 
$1.60) (Ib. $2.75) (5 Ibs. $11.00). 
ROHCO. A new introduction of the Im- 
perial variety. It is a selection from 
Imperial 615. Trials show it will pro- 
duce more marketable heads of highest 
quality and earlier than regular 615. 
(Pkt. 15c) (oz. 30c) (14 Ib. $1.00) (Ib. $3.50). 
We rec- 

New York No. 915 
IMPERIAL 815. A sturdy robust strain se- 
lected from 847. One of the best strains 
for Colorado but must be grown with care 
as it is a tight header and if weather 
is hot will tipburn and slime more quickly 
than 315 and 915. Will not stand long in 
the field when ready to harvest. We rec- 
ommend at least 2 or 3 cuttings. Don't 
wait until the entire crop has matured. It 
produces a surprisingly high per cent of 
No. 1 heads which are large, solid and of 
fine appearance. Likes frequent and 
light waterings. Best suited for early 
summer and late fall crops. 
(Pkt. 10c) (oz. 25c) (% Ib. 80c) (Ib. $2.75) 
(5 lbs. $12.50). 
NEW YORK 315. After thorough trials we 
like 315 very much. Similar to 915 it 
does stand hot weather better than most 
other varieties. At heading time it likes 
liberal amount of water. A rapid grower, 
heads are large, well formed, and slow 
to slime or tipburn. This strain was bred 
from New York No. 515 and is superior 
to its parent. 
(Pkt. 10c) (oz. 30c) (%4 Ib. 90c) (2 Ib. $1.60) 
(Ib. $2.75) (5 Ibs. $12.00). 
NEW YORK 415. Quite similar in habits 
and growth to 315. Heads are not quite 
as large, but are a little more uniform. 
It is adapted to planting on rich soils. 
(Pkt. 10c) (oz. 25c) (% Ib. 90c) (2 Ib. $1.50) 
(Ib. $2.60) (5 Ibs. $12.00). 
NEW YORK NO. 915. Our 1939 introduc- 
tion. One of the most popular of the New 
York varieties. Heads are good size, uni- 
form and not ribby. Stands hot weather 
better than most other varieties, slow to 
tipbburn and slime. It has its individual 
peculiar traits or habits. One is it must 
have plenty of moisture at heading time. 
If the ground is allowed to get dry at 
heading time 915 may bolt to seed. 
(Pkt. 10c) (oz. 35c) (%4 Ib. 90c) (lb. $2.75) 
(5 Ibs. $12.50). 
I-H IMPROVED IMPERIAL. The surest 
header of the Iceberg varieties either in 
the New York or Imperial strains, but on 
account of its unusual tight hard head it 
is quick to slime, especially in hot 
weather. Advisable not to have the crop 
come on during hot weather and should 
be cut just before the heads are fully 
matured. 
(Pkt. 10c) (oz. 25c) (14 Ib. 80c) (1 lb. $1.50) 
(Ib. $2.75) (5 lbs. $12.00). 

14 
THE WESTERN SEED COMPANY, DENVER, COLORADO 
