Research on the application test of POC coconut water waste and NPK 16:16:16 on the growth of areca nut (Areca catechu L.) seedlings has been carried out in Experimental Garden, Faculty of Agriculture, Islamic University of Riau, Pekanbaru, for 4 months starting from May to August 2023. Research objectives for determine the effect of the interaction of coconut water waste POC and NPK 16:16:16 o…