The Castle is surrounded by meadows and woods that extend all the way to the Ticino Park, with ancient trees and plants.
The natural environment is well preserved, of unique and rare beauty, featuring two large Renaissance garden terraces that embrace the castle.
During the warmer months, these areas can be used for aperitifs and exclusive dinners, leisure and relaxation activities, informal business meetings, and entertainment moments.
Consulting medieval-era documentation related to Jerago and its territory, it is common to encounter references to a place called «mons sancti Jacobi», Mount Saint James. On this hill,
which still exists today, stands the Visconti Castle of Jerago, preceded by the Romanesque oratory dedicated to Saint James, from which the hill took its name (from the book Percorsi Castellani).
After being property of the Visconti family for centuries, the castle passed to the Bossi family and, from a fortress, became a noble residence in 1756.
They opened the windows to the outside and created two large green terraces, full of plants and fragrant flowers, a Renaissance garden dating back to the second half of the 18th century.
The first garden terrace features a carefully arranged vegetation from which a majestic Magnolia over 200 years old emerges. Accompanying it are Olea Fragrans, which blooms with a very intense fragrance, Camellias that delight with both winter and spring flowering, the unique Ginkgo biloba which in autumn covers the lawn with topaz-yellow leaves, Azaleas with pink and lilac blooms in April and May, and towards the small grotto, Mahonia shrubs with yellow flowers and spiny leaves, which together with Heaths and Primroses create a colorful floral path.
Defining the perimeter of the second garden terrace are Boxwood and Rose hedges, while the corners host two Persimmon trees. In this green area, there is a beautiful Pomegranate, some Laurel plants, and a Calycanthus tree, which blooms in January releasing an intense fragrance.
In the woods, Chestnuts, Black Locusts, Conifers, Hornbeams, and near the pond, Taxodium Distichum (Sequoia), also listed in the heritage register. Moving west, there is a Cherry tree that blooms between March and April, attracting a large number of birds. The park has a very varied composition, including brambles, hawthorns, and elderberries. It shelters several animal species including squirrels, some hares, foxes, wild rabbits, and various bird species including hawks and cuckoos. Some American Oaks form the backdrop to the large meadow to the west.
From the top of the Castle, looking towards the triangular lawn, it is possible to admire a large Oak, grown from an acorn taken from a garden in Brianza and planted in the ground by little Mina da Fontana in 1961. Additionally, from above, one can admire the peaks of the high Alpine massif: Monte Rosa. On clear days at sunset, the mountain range turns pink.