Hakgala Botanical Garden is one of the five botanical gardens in Sri Lanka. The other four are Peradeniya Botanical Garden, Henarathgoda Botanical Garden, Mirijjawila Botanical Garden and Seetawaka Botanical Garden. It is the second largest garden in Sri Lanka. The garden is contiguous to Hakgala Strict Nature Reserve.
The garden was established in 1861, under George Henry Kendrick Thwaites as an experimental cultivation of Cinchona, a commercial crop thriving at the time. Once after the Tea replaced 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.