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Imperial Iceberg No. 847 
LETTUCE 
1 oz. to 2,500 plants; 3 lbs. per acre 
Days given represent time for growing marketable heads 
from date of sowing seed. 
Lettuce to be at its best should be grown rapidly, 
hence the soil should be made as rich and friable as 
possible by liberal manuring and thorough preparation. 
For early crop sow in a seed-bed in September or Oc- 
tober and protect through the winter with cold frames, 
which should be removed as soon as danger of severe 
freezing is past. Lettuce in the open ground will stand 
some freezing but is killed by prolonged frost or fre- 
quent freezing and thawing. The seed may also be sown 
in hotbeds in March, and the plants, if well hardened, 
may usually be sef in the open ground in April, maturing 
a crop much earlier than complete open ground cultiva- 
tion would produce. If, however, it is not convenient 
to get the plants started either in the fall or early spring 
in hotbeds, the seed may be sown in open ground from 
Imperial Iceberg No. 44 
the middle of April until July, selecting varieties suit- 
able for the season. Improved germination results when 
seed is treated in ICE WATER for 8 hrs. prior to plant- 
ing. 
The plants should stand 8 to 16 inches apart in the 
rows according to variety and the rows should be about 
18 inches apart. Heading varieties particularly should 
be well spaced to afford plenty of air circulation which 
helps materially in preventing bolting to seed. 
BIBB—(57 days) Finest quality home gardeners extra 
early head lettuce; forms small very dark green head. 
Must be grown to head very early in summer or very 
late as it readily bolts to seed in hot weather. 
CORNELL NO. 456—(80 days) A very sure heading 
Imperial type, resistant to early bolting and to tip 
burn. Frame and head slightly smaller than Great Lakes 
and of lighter color. Particularly adapted for muck soils. 
GRAND RAPIDS—(43 days) U. S. No. 1 Tip Burn Re- 
sistant. Popular loose-leaf strain, very satisfactory for 
both market and home gardens. 
GREAT LAKES—(82 days) One of the most satisfac- 
tory of the Imperials. Large and vigorous, attractive 
color, resistant to tip burn and stands up well in hot 
weather. 
IMPERIAL ICEBERG NO. 44—(82 days) Developed 
in California by Dr. Jagger of the U. S. D. A. primarily 
as a sure heading, disease resistant variety for shipping 
to the eastern markets. Its adaptability to many various 
growing centers and a wide range of climatic conditions 
make it one of the most dependable and sure heading 
types of Iceberg for this section. 
IMPERIAL ICEBERG NO. 847—(84 days) Black 
seeded strain grown successfully in the east and south 
for several years. Produces large size, solid, well, . 
rounded heads under conditions where other Iceberg 
types do not succeed. 
16 J. MANNS & CO., BALTIMORE 2, MD. ° 
Superior Seeds 
