Inorder to study letluce seed production locally under greenhouse conditions, four experiments were conducted using Simpson 100and Great Lakes 118, as imported varieties. To describe flowering and seed formation, estimate seed production per plant and per hectare and to evaluate inIhe laboratoryand in the field the locally produced seed. Results show clearly that it is possible to produce lettuce seed locally under greenhouse conditions, getting yields as high as 247 and 172 Kg/ha for Simpson and Great Lakes, respectively. Germination data for bolh varieties provedthat fresh letluce seeds aredormant, but it decreases notoriously to the tenlh week after harvest. However, when the seed is treated for 10 days with 5°C, the dormancy is broken and the germination increases. When both seed types (local and imported) were compared under greenhouse conditions, it was found that the imported seed was slightly superior to the locally produced one with respect to emergence and seedlings dry weight, bul theywere uniform independentlyofvarietyand origin.