The garden covers eight hectares and is irrigated by the river Ninfa and several irrigation streams and is planted with trees, shrubs and plants from all over the world. Near the church of San Giovanni there is an American walnut tree, ornamental apple trees, a red beech, and a Japanese pink-leaved maple tree. Behind the church of Santa Maria Maggiore there is a yellow bignonia and several rose bushes. The cypress avenue is planted with erythrina crista-galli, also known as the cockspur coral tree. In the vicinity of the Roman bridge there are jasmines, wisterias and a plantation of Chinese bamboo. Elsewhere in the garden there are banana trees, papyruses, a cedar and an Australian casuarina tenuissima, a eucalyptus, a star magnolia, climbing hydrangeas, and a liriodendron tulipifera, otherwise known as a tulip tree due to its tulip like flowers.
It is classified as a Regional Natural Monument and has been determined by some as the world's most romantic garden.