The origins of the Delgosha garden date back to the Sasanian period. This garden belonged to the ancient fortress of Kohan dezh, of which remains remained until half a century ago. The grounds of this garden are located near the outlet of an ancient underground channel whose water has always been used for irrigation.
In the qajar era also palaces were built in this garden. The garden and its palace were part of the properties of Khorshid Kolah Legha'-ad-Doule, daughter of Ghavam al-Moluk, who lived there with her husband Nazem Al-Molk. After the purchase by its owner, the palace and the surrounding garden with an area of 7,5 hectares have been included in the list of Iran's national works.
Most of the trees in this garden, which is irrigated by the source of the underground channel "Sa'adi", are citrus, in particular lemon, orange and bitter orange trees (melangolo). In addition to citrus trees, the vegetation of the garden is composed of pines, cypresses, palms and walnuts.
The main avenue of the garden extends from the entrance portal to the pool in front of the building. On either side of this avenue there are two citrus flower beds. Pine and cypress trees are planted on the edge of the avenues to the east, west and south of the main garden building. On the northern side of the garden there is a small garden called "Baghche-ye Tavus" (Giardinetto del Pavone) whose ancient cypress pine trees and palms are interspersed with rows of trees of melangolo.
Facing the southern facade of the building there is a large basin whose edges are made of reddish stone. In the middle of this basin there is a large stone vase in which a cypress was placed in the past. The main facade of the building faces south and includes a loggia of two columns.