At the end of October 2021, a new plot of P. arundinacea was sown at the experimental teaching farm of the University of Tuscia - Viterbo (IT). With the creation of 24 plots, the phytoremediation capacity of reed canary grass on Arsenic-rich soils will be evaluated, by studying how the growth of the plant varies in a different sowing season compared to that of spring. It will be tested whether autumn sowing has better adaptability and competitiveness and if this will in turn lead to a change in the uptake and storage capacity of arsenic in the plant biomass.