The comparison of plant growth between control and chitosan liquid fertilizer that the treatment of chitosan liquid fertilizer was not promoted stems height and leaf length on waxy corn. Which different from Mondal et al. (2013) reported that foliar application of chitosan at vegetative stage enhanced plant growth and development and increased seed yield in maize. Growth of waxy corn might be the effect of ammonium sulfate, because of ammonium sulfate had nitrogen to promote the growth (Jones, 1998). Moreover, Tisdale et al. (1990) reported that ammonium sulfate promoted growth in the early stages or vegetative stage, which was the most important phase in the growth and develop.