Evaluation location: Washington, United States
Lactuca serriola was planted on Oct. 23, 2008 in the greenhouse or in a bubble house at Pullman, Washington.
Greenhouse conditions: day length 14 hours, combination of high pressure sodium and metal halide lights. Day temperature of 70 F., night temperature of 60 F.
Bubble house conditions: day length 12 hours from 11/5/2008 to 1/12/2009 and 16 hours from 1/12/2009 up to harvest. Day temperature 75 F., night temperature 55 F.