ABSTRACT Peatlands are characterized by low fertility and high acidity, which limits the optimal growth of plants, including the fast-growing species Alstonia pneumatophora. This study aimed to determine the effect of applying Liquid Organic Fertilizer (POC) F1Mbio on increasing the Nitrogen (N), Phosphorus (P), and Potassium (K) content in peat, and to evaluate its subsequent impact on th…