Hantam National Botanical Garden, National botanical garden in Nieuwoudtville, South Africa.

Hantam National Botanical Garden is a botanical garden in Nieuwoudtville that spreads across a large landscape of rocky terrain and native shrub vegetation. The site features several hiking trails and protects many plant species found in the region.

The garden's origins lie in the farm Katlaagte, established by Scottish immigrants around 1883. The MacGregor family built its farmhouse group in 1929 to a design by Scottish architect John Lyon, and the farm was later renamed Glenlyon after Helen Lyon. In October 2007 SANBI bought the farm Glenlyon, and in 2008 Minister Marthinus van Schalkwyk declared the botanical garden a state institution by notice in the national gazette.

The garden serves as a gathering place where visitors discover the plant diversity of the region through their own walks and observations. People come here to understand how plants adapt to the local climate and rocky terrain.

Visitors can choose among marked hiking trails to explore the grounds at their own pace. The best time to visit is between August and mid-October, when many plants are flowering.

The farm that became the garden was bought by SANBI in October 2007 with funds from several conservation bodies, and the garden was proclaimed in 2008 by minister Marthinus van Schalkwyk. Its 1929 farmhouse group, designed by Scottish architect John Lyon, now houses the garden's administration.