Euphorbia clandestina is endemic to the southern Cape where it is found roughly from Swellendam in the west to Uniondale in the east.
Although the plants often prefer bushy rocky elevations, their habitat is not entirely restricted thereto. Euphorbia clandestina is also found growing on plains near Dysselsdorp.
Euphorbia clandestina may grow happily on a rockery in a karoo garden. The plants however die easily. Plants that grow tall often need to be supported else they may capsize.The bushes in their natural habitat often aid the plants to stay erect.
Euphorbia clandestina in habitat between Oudtshoorn and Mossel Bay.