After returning to England in 1894 Hume turned his attention to British and European botany, and horticulture, which eventually led him to create the Institute in a large Victorian house in Norwood Road, Tulse Hill, South London, to provide an environment where anyone interested in plants, whether amateur or professional, could meet to develop their knowledge of botany.
The Institute has changed little since its founding, and is of interest to historians as well as botanists. It contains the original library with an extensive collection of botanical books, monographs and journals and herbarium with a collection of dried, pressed plants from Britain and Europe, mounted on sheets accompanied by collecting details, to help members name or identify plants correctly. The lecture room was renovated and restored in 2015, including some unique wallpaper designed by Augusta Ackerman. There is an active programme of talks, practical courses, and field excursions.
- "South London Botanical Institute Garden, Lambeth". London Parks & Gardens Trust. Retrieved 2010-11-25.
- "The Garden". South London Botanical Institute. Retrieved 2010-11-25.