In the succulent house, plants grow from the dry, hot regions of the earth. Latin "succus" means sap. Succulents are therefore plants that accumulate a lot of water and can thus survive hot and dry seasons. The succulent house is divided into two parts:

In the front part: plants from the New World of North and South America. Here you can see mainly, but not exclusively, cacti. The large specimens of Echinocactus grusonii at the entrance to the house date back to the founding years of the garden at Spalentor and are well over 100 years old.

At the back: plants from the Old World, especially from Africa. A mixture of representatives from different plant families is shown here. In the rearmost section are succulents from the Canary Islands. The candelabra-shaped spurge species (Euphorbia) from Africa look like cacti at first glance. They can be recognised by the fact that they bear the thorns in pairs and not in groups, like the cacti.

On display in the Succulent House are, among others:

• Alluaudia (Alluaudia ascendens)
• Marloth's aloe (Aloe marlothii)
• Golden ball cactus or mother-in-law's chair (Kroenleinia grusonii syn. Echinocactus grusonii)