The distribution of Euphorbia silenifolia extents from the Western Cape to Port Alfred. The plants prefer areas with higher rainfall and avoid desert-like Karoo areas.
Euphorbia silenifolia is a geophyte (subterranean species) which grows during the winter months. The plants are not visible during the summer. During autumn the thin leaves start to grow from the apex of the underground stem.
Euphorbia silenifolia is unisexual producing male and female flowers on different plants.
The flowering time in habitat is in May and June.
Euphorbia silenifolia, a male plant in cultivation.