THE ROCKY MOUNTAIN SEED CO. -:- DENVER, COLO. 13 
Lettuce 
(Lattuga, Lechuga, Lattich, Kopfsalat) 
CULTURE—One ounce will sow 150 feet of drill, two pounds an 
acre. Lettuce is a hardy plant and will stand a low degree of tem- 
perature; however, a moderate temperature is desirable during the 
growing period. Lettuce stands cold much f Cas than heat, making 
lity during the hot sum- 
Hot weather causes the plants to go to seed instead 
it impossible to produce lettuce of good qu 
mer months. 
of heading. 
Lettuce requires considerable soil moisture; however, an excess 
A light, loamy soil, enriched with 
well-rotted manure, is best adapted for the successful growing of 
If planted on poor soil the heads will be small and leaves 
of moisture may cause stem rot. 
lettuce. 
tough. 
As soon as the ground can be successfully worked, sow in drills 
15 to 20 inches apart, one-half to one inch deep, thin the plants 
8 to 15 inches apart in the row. Large headed varieties, like New 
York Wonderful or Iceberg, thin to 15 inches in the row. 
NEW YORK or WONDERFUL—Commonly called 
Iceberg by the produce trade. A large curled head- 
ing lettuce, with dark green leaves. Heads are well 
blanched, sweet, tender, crisp and of excellent 
quality. 
Postpaid (Pkt. 10c) (Oz. 35c) (%4 Ib. $1.00) 
(ib. $3.40). 
NEW YORK No. 12—A widely used strain of New 
York, well adapted to mid-season maturity, as it 
stands heat well. Plant and head lighter green 
than New York, with fewer outer leaves, several 
days earlier; large, compact and attractive. 
Postpaid (Pkt. 10c) (Oz. 35c) (%4 Ib. 
(ib. $3.40). 
$1.00) 
NEW YORK No, 55—All American Selection for 1942, 
introduced by Pieters-Wheeler. Probably the 
earliest maturing New York type in existence. 
Good base, hard heading, crisp, of the highest 
quality with considerable resistance to tip-burn. 
Heads well in summer and early fall. 
Postpaid (Pkt. 10c) (Oz 35c) (% Ib. $1.00). 
NEW YORK No. 515—A Pieters-Wheeler introduc- 
tion, bred as a summer variety to resist Tip-burn. 
A cross between Iceberg and New York resembling 
No. 12, has a better fold, is more sure heading and 
more resistant to Tip-burn. 
Postpaid (Pkt. 10c) (Oz. 
(ib. $3.40). 
35e) (% Ib. $1.00) 
SPECIAL STRAINS OF NEW YORK No. 515—Spe- 
cial Strains are bred from single plant selection, 
highly resistant to Tip-burn. 
No. 1998—An improved strain, larger, darker green 
and has a better base structure. An ideal sum- 
mer lettuce. 
Postpaid (Pkt. 
(ib. $3.40). 
10e) (Oz 35c¢) (% Ib. $1.00) 
TRIPLE XXX—The best of the No. 515 types, highly 
resistant to Tip-burn. 
Postpaid (Pkt. 10¢) (O”. 35¢) (% Jb. $1.00) 
(ib. $3.40). 
IMPERIAL No. S47—Resistant to brown blight. 
Heads hard and fine. Best for early spring and 
late fall crop. Black seed. 
Postpaid (Pkt. 10¢) (Oz. 
(ib. $3.40). 
Bie) (1% Vb. $1.00) 
IMPERIAL No. 815—Black Seeded identical with No. 
847, for which see description. 
Postpaid (Pkt. 10c) (Oz 35e) (4%. Wb. 
(ib. $3.40). 
$1.00) 
IMPERIAL No. 615—Bred from Imperial No. 152 but 
somewhat later; resistant to brown blight; does 
not develop suckers. Heads medium large, solid 
and firm. Best for fall crop. 
Postpaid (Pkt. 10c) (Oz 35ce) (% Ib. $1.00) 
(Ib. $3.40). 

Imperial No. 847 
IMPERIAL No. 152—Resistant to brown blight, 
adapted for fall crop. Dependable in heading 
heads medium large, solid and attractive. 
Postpaid (Pkt. 10c) (Oz 350) (% Ib. 
(ib. $3.40). f 
$1.00) 
IMPERIAL No. 44—Is an Iceberg type and is su- 
perior to N. Y. Special. Outstanding in trials this 
past year. A large head, solid and crisp. Forms a 
larger percentage of marketable heads than other 
varieties. Seems to be quite resistant to tip-burn. 
You will be well pleased with Imperial No. 44 
either on muck or upland soils. Stands the hot 
weather when others fail. 
Postpaid (Pkt. 10c) (Oz. 
(ib. $3.40). 
a5e) (% th. $1.00) 
IMPERIAL No. 850—Very similar to Imperial No. 
847, but white seeded. Heads very similar in gen- 
eral, though No. 850 has somewhat shorter leaves, 
more yellow-green in color and is perhaps more 
resistant to tip-burn. 
Postpaid (Pkt. 10c) 
(lb. $3.40). 
DENVER MARKET—Heads medium sized, conical, 
crisp, of good quality. Leaves light green, much 
crumpled and coarsely fringed on the edges. 
Postpaid (Pkt. 5c) (Oz. 25c) (4 Ib. 75e) (Ib. $2.10). 
(Ox. 35¢) (14 Ib. $1.00) 
IMPROVED HANSON—Large, compact head with 
yellowish-green leaves, curly with fringed edge. 
Good for mid-summer planting. 
Postpaid (Pkt. 10c) (Oz. 25c) (44 Ib. 75e) (ib. $2.10). 
PARIS WHITE COS or ROMAINE—Large size, and 
medium green, compact head, well blanched. For 
home and market, and well adapted for green- 
house use. 
Postpaid (Pkt. 10¢c) (Oz. 25e) (4 Ib. T5c) (th. $2.10) 
Leaf Lettuce 
BARLY CURLED SIMPSON or SILECIA—A fine 
home garden sort, with light green frilled leaves 
Postpaid (Pkt. 10c) (Oz. 20c) (14 Ib. 70c) (ib. $2.10). 
BLACK SEEDED SIMPSON—An early loose leaved 
type, with yellowish-green frilled leaves, 
Postpaid (Pkt. 10c) (Oz. 20c) (%4 Ib. 70c) (ib. $2.10). 
GRAND RAPIDS—One of the most popular sorts, for 
forcing or out-of-door use. Plants compact with 
light green frilled leaves. Tip-burn resistant. 
Postpaid (Pkt. 10c) (Oz. 25e) (14 Ib. T5e) (Ib. $2.35). 
PRIZEHEAD—An early non-heading sort, leaves 
dark green edged with brown and highly frilled. 
Postpaid (Pkt. 10c) (Oz. 25) (14 Ib. 75c) (ib. $2.35). 
CHICKEN LETTUCE—Tall growing variety produc- 
ing many leaves, for chicken and rabbit feeding. 
Postpaid (Pkt. 10c) (Oz. 15¢e) (%4 Ib. 40c) (th. $1.35). 
