This research aims to determine onion crop response to multiple doses of palm oil mill wastewater (LCPKS) and coconut water plant growth regulator (PGR). This research has been conducted at the Faculty of Agriculture Experimental Station Riau University Campus Bina Widya km 12.5 Simpang Baru Village, Tampan Sub District, Pekanbaru, for three months from April to June 2017. This study used a ran…