Evaluation location: Washington, United States
Descriptor data for the Lettuce single plant special collection was collected during the growing season at the WRPIS Central Ferry, WA farm in 2011 and 2012. The nurseries were direct seeded May 25, 2011 and May 8, 2012. The nurseries were sprinkler irrigated until emergence and then drip irrigation was used. Seed sown was from single plants.