As a result of the unspoilt natural environment, Saint Honorat is home to a wide variety of Mediterranean vegetation, ranging from plants typical of seaside locations, to trees and plants traditionally found in wooded areas: luxuriant plants, pines, cypresses, eucalyptus, palms, olive-trees, oaks…

There are also certain plants that grow here outside of their natural environment, such as the tree heath (Erica arborea), or the arbutus.