Botanical Garden houses the orchidarium and the green house, which is one of the best places to visit the flora and fauna. It is one of the ideal places to gain knowledge about various species of plants. Yercaud is known for Kurinji flowers, plenty of which can be seen in this garden. The speciality of this flower is that it blossoms once in twelve years.The National Orchidarium, housed within the Botanical Garden, is located at a distance of 2 km from the Emerald Lake. This orchidarium houses a wide assortment of orchids, which includes 30 species of exclusively found orchid. In addition, the orchidarium also features several endangered species of orchids, which are preserved here. Owing to this fact, the place is ranked third largest of all the orchidarium in India. Vernonia shevaroyensis and lady’s slipper orchid are some of the other species of orchids displayed in this orchidarium.