The purpose of this study was to see the effect of organic NPK and rice washing water intervals on the growth and production of caisim mustard. The research was carried out at the Experimental Garden of the Faculty of Agriculture, Riau Islamic University, Jalan Kharudin Nasution Km 11, Air cold Village, Bukit Raya District, Pekanbaru City. The research was carried out for 2 months starting from…