Founded in 1968, the garden extends over an area of about 150ha (370ac) and is planned to be the main center for horticulture and plant taxonomy in Iran.

A herbarium of Iranian plants is gradually being built up and now consists of some 160,000 species. It also contains gardens of non-Iranian plants, an arboretum, six lakes, hills (to represent the Alborz and Zagros mountains), a rock garden, a waterfall, a wetland, a river about 1 km long, systematic area, fruit garden, picnic area with some pavilions, desert plants areas, a salt lake and a wadi (a dry, ephemeral, riverbed that contains water only during times of heavy rain). The botanical and horticultural library has more than 11.000 volumes.

The area, located at 1320m altitude by the freeway between Tehran and Karaj, is flat and slopes gently to the south. The Albourz Mountains forms the background. The climate is dry with an average annual precipitation of about 240 mm falling between November and May. Temperature reaches as much as 42–43ºC during July and August. During winter the temperature may fall to –10ºC or lower. The natural vegetation of the area is dry Artemisia Siberia steppe.

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Sources: Research Institute of Forests and Rangelands, Wikipedia, instagram @nbgiran, Mehr News Agency (MNA) 1, MNA 2, MNA 3, Tehran Picture, tishineh.com, netbaran.com, behtarynha.com