The greyish green, aromatic leaves of Pelargonium griseum are finely and irregularly pinnate, the tiny, heart-shaped leaflets on both sides of the central leaf axis bringing about a feather-like appearance. Whorls of young leaves grow on the old and new stems alike. The leaflets are densely covered in glandular hairs, particularly along the margins of the segments or leaflets.
The leaves resemble those of P. abrotanifolium but are shorter and closer together.
P. griseum is only slightly browsed by game and livestock. An infusion of the leaves is said to be used against colds, rheumatism and gout in the Sutherland area (Shearing and Van Heerden, 2008; iNaturalist; https://www.pelargonium.si).