Empty fruit bunch (EFB) and palm oil mill effluent (POME) co-composting could produce organic fertiliser which is good for conventional straight chemical fertiliser substitution in oil palm plantations. Field trial performance evaluation of specially formulated palm biomass compost fertilisers known as ‘Living Organic Fertiliser’ and ‘Fortified Organic Fertiliser’ in various soil types showed that organic fertiliser application had improved the fresh fruit bunch (FFB) yield significantly compared to conventional straight chemical fertiliser application, except for clay-sandy soil.