The garden has a cool temperate climate because of altitude is 5,400 feet above the sea level. The mean annual temperature ranges between 16°C to 30°C during course of a year.
From December to February it has a cold climate, while the warm climate persists from April to August.
Garden established in 1861 as an experimental cultivation of Cinchona, a commercial crop thriving at the time. Once after the Tea replace the Cinchona, it was turned into an experimental Tea cultivation. In 1884 it transformed to a garden since then many sub tropical and some temperate plants were planted in the gardens. There are over 10,000 species of flora planted here and during the Spring season in Nuwara Eliya thousands of visitors come to see the blooms here. The garden is famous for number of species of Orchids and Roses are planted there.
