This research aims to determine the effect of liquid organic fertilizer made from waste tilapia (Oreochromis niloticus) on the growth of Kailan (Brassica oleracea L.) The research method used was an experimental method with a completely randomized design consisting of five treatments and five replications. The treatment consisted of P0 (control), P1 (15%), P2 (30%), P3 (45%), P4 (60%). Data wer…