The substitution of conventional fertilizer with foliar organic fertilizer for Lettuce in addition to reducing the risk of contamination of the soil and the water table, can increase the efficiency of fertilization and so the yield, minimizing the costs of mineral fertilizers. This research was conducted to evaluate the growth and yield performance of Tyrol and Fanfare varieties of Lettuce using the different rates of application of formulated organic foliar fertilizer under lahar- laden soil. Fermented banana stems were used in this study. The two-factor experiment was laid down using a 2x 4 factorial experiment in Randomized Complete Block Design (RCBD), replicated three times. It was conducted at President Ramon Magsaysay State University Organic Vegetable Project Site, which was affected by lahar during the eruption of Mt Pinatubo. The study's findings indicate that the application of fermented plant juice slightly improved Lettuce's growth and yield performance. Fanfare variety of lettuce had significantly better growth performance than Tyrol variety. However,  there were no significant differences in the yield performance of Lettuce as affected by variety and the different rates of application of fermented plant juice. This study would benefit the vegetable growers in the lahar-laden areas in Central Luzon. 

Keywords: Lettuce, Fermented Plant Juice, Molasses, Microorganisms, Organic Foliar Fertilizer