This study aims to (1) Test the effect of giving leaf fertilizer from seaweed liquid organik fertilizer on growth and yield on purple eggplant plants (2) Obtaining the right dose of liquid seaweed organik fertilizer on growth and yield on purple eggplant plants. This research was conducted in the Experimental Field of the Faculty of Agriculture, University of Muhammadiyah Yogyakarta in April 2018 - September 2018. The design used was a Completely Randomized Design (CRD) consist of 5 treatment levels namely seaweed POC EC 1, seaweed POC EC 2, seaweed POC EC 2.5, seaweed POC EC 3 and without treatment (control). The results of the observations were carried out by analysis of variance or analysis of Variance with a level of α: 5%. If there is a significant difference in the effect between the treatments tested, then the further test is by using Duncan's Multiple Range Test with a level of α: 5%. Research results show that seaweed POC removal can increase plant height, leaf number, plant fresh weight, plant dry weight, leaf area, number of fruits, total fruit weight, fruit length and fruit diameter.