24 
BULLETIN 1412, U. S. DEPARTMENT OF AGRICULTURE 
No accurate figures are available of the quantity of greenhouse 
lettuce produced and shipped. The northern greenhouse sections 
market lettuce locally for about 10 months of the year, and during 
the late winter and spring, the seasons of heaviest production, the 
CARLOADS 
HUNDREDS 







5 
NEW MEXICO 
CALIFORNIA (Northern Division) ^ 
NEW JERSEY ^---^^ 
IDAHO fitfVBBBB 
WASH 1 N GTO N ^Mm^b__ 
_ m J^m SOUTH CAROLINA 
COLORADO ^^^J| ■ 
jf NORTH" CAROLINA 
IffilMI ARIZONA ii ,, m 
JAN FEB MAR. APR. MAY JUNE JULY AUG. SEPT OCT. NOV 
Fig. 15. — No one section has the market monopolized 
DEC 
crop frequently moves in car lots to more or less distant markets. 
The Cleveland section, for example, at times supplies cities and 
towns within 500 miles, mainly Pittsburgh, Detroit, Cincinnati, and 
Youngstown. 
