After forming a highly branched bush, Euphorbia arbuscula becomes a true tree as it ages. The young plant is used as fodder by local herbivores which, when the year is dry, can graze the plant right down to the roots, leading to a decline in the species.

After forming a highly branched bush, Euphorbia arbuscula becomes a true tree as it ages. The young plant is used as fodder by local herbivores which, when the year is dry, can graze the plant right down to the roots, leading to a decline in the species.