The increasing production of nanoparticles (NPs) has led to concerns over the potential adverse impacts of these NPs on biota in natural environments. Silver nanoparticles (AgNPs) are one of the most widely used NPs and are expected to enter natural ecosystems. Here we examined the effects of AgNPs on morphology and physiology of Canna indica in constructed wetlands. Canna indica responses to AgNP exposure in constructed wetlands experiment. The impacts of different AgNPs concentrations (0, 0.1, 5, 10 µg.L-1) on plant phenotypic and physiological traits were measured. The statistical analysis showed that there was no significant difference (p≥0.05) between the concentrations of AgNPs with the plant heights, plant leaves, and chlorophyll. The statistical analysis showed that there was a significant difference (p≤ 0.05) among the concentrations of AgNPs with the number of daughter plants and with the POD. However, a positive significant correlation was found between plant height and POD (r=98). Our findings suggest the possibility of adopting the phenotypic and physiological indicators of plants used in constructed wetlands as a good indicator of the effect of AgNPs.