Wetland plants, commonly known as hydrophytes, are present in the areas flooded with water or having saturated anaerobic conditions. The corresponding soil systems of different plant species differ with respect to the physiological and morphological conditions. A diverse range of parameters including the hydrology, temperature fluctuations, soil characteristics, light conditions, oxygen availability, redox potential, pH, ion solubility, microbiome, and nutrient cycling influence the growth of wetland plants. The maintenance of the optimum conditions is crucial in investigating the important processes occurring in the soil–plant systems. Latest developmental approaches have allowed the researchers to investigate the role of important nano-technological applications in regulating the morpho-physiological conditions. The role of metallic nanoparticles, most importantly silver nanoparticles (AgNPs) has been thoroughly studies in the terrestrial plants. However, not much research have been conducted on wetland plants and soil systems. Rigorous studies are being conducted to demonstrate the role of AgNPs in different wetland plant species along with their impact on the soil system especially the inhabited microbial community. Having both positive and negative impacts, AgNPs have been found to play important roles in the nutrient uptake and translocation, bioaccumulation and phytoremediation, growth and development, and seed germination and fruit production in different wetland plant species. However, massively induced phytotoxicity has also been found with the potential application of AgNPs. This book chapter focuses on the diverse effects on AgNPs on different species of the wetland plants.