Areas plagued with heat islands will especially be subjected to dangerously high temperatures. Consequences include dips in quality of life for the residents of the city. Trees help reduce the temperature during the day, thanks to both the shade they provide, and the phenomenon of evapotranspiration. The canton of Geneva wishes to estimate the current canopy rate, and predict how this quantity will change in the years to come. Tree growth is influenced by many parameters. One of the main goals of our model is to take into account as many of these parameters as possible for tree growth agent-based modelling.