The rocks are mainly dolorite and Beaufort shale. The Nama-karoo region represents the largest part of South Africa. It is situated in the higher inland western part of South Africa.
Rainfall is mainly during the summer months, with peaks in autumn and spring and frost in winter.
It is not as rich in succulent and bulbous plant species as the succulent karoo parts of Namaqualand, Knersvlakte and Little Karoo regions. The vegetation here is known as Nama-karoo and consists mainly of dwarf shrublands and sparse grassland with small trees and shrubs on the outcrops. Various plants from this region have been introduced to the conservatory. This section has been filled with mainly dolorite and shale rocks from the Fraserburg region and surface limestone from elsewhere. Prominent plants introduced include many members of the Mesembryanthemaceae.