In agriculture sectors, fertilizer is a vital element that determined the sustainability of crop production. Recently, there are various type of chemical and organic fertilizers in global market. However, some of these fertilizers are very expensive and become a burden to small-scale farmers. Waste products such as fish trash and tea ground are known as valuable wastes that can be transformed into useful product such as fertilizer. Therefore, this study was conducted to determine the effect of organic fish fertilizer with tea ground towards maize plant growth performance. Organic fish fertilizer was produced by aerobic fermentation of fish wastes with tea ground within 45 days. Approximately 30 maize plants were divided into two groups, each with three replicates, which represented as control that used commercial fertilizer, and as treatment that used organic fish fertilizer. Fertilizers were applied using spraying method under the leaf in four days of interval throughout the 2 months of cultivation period. Parameters of plants growth performance were observed and recorded twice a week based on responses of plant towards respective fertilizers such as plant height, width and length of leaf and number of leaf. Undeniably, maize plant that applied with commercial fertilizer showed better results compared to organic fish fertilizers plants as it contained high nutrients level. However, statistically the height of maize plant treated with commercial fertilizer showed no significant different between both groups (P>0.05), where at the end of planting period, control plants had reached average height of 51.43 ± 4.76 cm while plants applied with organic fish fertilizer managed to reach average height of 41.55 ± 2.30 cm. As a conclusion, organic fish fertilizer was able to promote plant growth even though with slower growth. Further improvement could be done by adding other high nutrient value of by-products in order to increase the efficiency of organic fish fertilizer.