The botanic gardens of Sezana are situated in the north – eastern part of the town. Sezana has been the administrative centre of the Upper Carst since 1848, and was a commercial and traffic centre already before the date.
The trader family Scaramanga from Trieste was so enthusiastic about the location and the significance of the town that it build a summer residence. In the period between 1848 and 1880 they bought from the farmers the land of which the today's botanic gardens are located. A greenhouse was built in 1890 for those plants that are particularily sensitive to the cold weather. In the botanic park the Scaramanga family cultivated plants from many different parts of the world. They planted deciduous trees from North America, Japan, coniferous trees from Europe and Asia and evergreens from Mediterranean.
Officials fo the park have been completing since 1948 the selection of coniferous and deciduous trees as well as bushes by adding new plants. At the same time they enlarged the stock of plants within the greenhouse by achuiring new material from subtropic, dry and tropic parts of the world.