Addition of Eco Enzyme as a Biostimulant for Liquid Organic Fertilizer for the Growth of Curly Lettuce (Lactuca sativa L.) in the Kampoeng Pintar Oase Tembok Gede Vertical Garden
Azzahra Imairel Putri Diyati Mulyono, Herlina Fitrihidajati, Adi Candra, Nurcholis Nurcholis, Aseyan Aseyan
Journal of Community Service and Empowerment
Urban Farm DB summary
A study examined adding Eco Enzyme to liquid organic fertilizer (LOF) made from garlic and onion skin waste as a potential replacement for chemical AB Mix fertilizer in growing curly lettuce (Lactuca sativa L.) in a vertical garden system. Conducted from September to November 2025 at the Oase Tembok Gede Smart Village in Surabaya, Indonesia, nutrient testing per Indonesian Ministry of Agriculture Decree No. 261/KPTS/SR.310/M/4/2019 found the LOF's K2O content at 2.03%, meeting the minimum standard. In a Completely Randomized Design with four treatments and three replications, ANOVA showed no significant difference between treatments (p > 0.05), though the 60 mL treatment (P3) produced the best growth—11 cm height, 7 leaves, and 11 g fresh weight—with the study noting that growth remained good despite suboptimal fertilizer nutrient quality, supported by favorable environmental conditions.