Irans National Botanical Garden has 8,000 plant species in an area of about 150 hectares located by the side of a highway between the capital, Tehran, and the city of Karaj.
The garden was founded in 1968. Six lakes have been formed. Two hills (the highest reaching 19 m) have also been built up to represent the Alborz and Zagros mountains, (the largest mountain chains of Iran).
A herbarium of Iranian plants (TARI) is gradually being built up and now consists of some 160,000 numbers. Also there are gardens of non-Iranian plants, including as Himalayan, American, Japanese, African, and Australian species.
A large rock garden with cliff walls and a waterfall, a special section for Iranian bulbous plants, a second cliff wall with waterfalls and a wetland have also been built up in the garden.
The National Botanical Garden of Iran is planned to be the main center for horticulture and plant taxonomy in Iran.