<![CDATA[Pineapple peel waste is an abundant agricultural residue that remains underutilized. This study aims to produce liquid organic fertilizer (LOF) from pineapple peels using EM4 bioactivator, cow manure, rice-washing water, and palm sugar through a 30-day fermentation process. Fermentation performance was monitored via daily temperature and pH, along with nutrient content analysis including nitrogen (N), phosphorus (P), potassium (K), and organic carbon (C-organic). The results showed temperature ranged from 27.9–32.3°C and pH between 3.0–4.0, within the optimal range for microbial activity. However, nutrient concentrations of N (0.153%), P (0.116%), K (0.105%), and C-organic (1.58%) did not meet the Indonesian National Standard (SNI 261/2019). This indicates that pineapple peel alone requires nutrient-rich additives to produce standard-compliant LOF. This study highlights the potential of pineapple peel waste as an eco-friendly LOF source, emphasizing the need for further formula optimization.]]>
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