Fly ash is a residual solid combustion carried by gas. The content of fly ash is similar to zeolite. Hence, fly ash can be used instead of zeolite for fertilizer carrier. Slow release test result was revealed that N element has higher release level. The activity plant test was conducted on chili plant using parameter variation of fertilizer composition and plant height. Based on the research result, triple phosphate-fly ash fertilizer in comparison 2:1 gave the best result.