The leaves of Pelargonium curviandrum grow in a ground level rosette, here dense enough to conceal the petioles that may become fairly long. Tiny stipules at the base of the petioles adhere to the leaf stalk for half their length before veering away.
Leaf-shape is broadly ovate with obtusely pointed tips. The margins are shallowly scalloped apart from near the base where it is entire and may be slightly lobed. The soft hairs on the leaf blades have some glandular hairs among them, occurring on both surfaces.
The fresh green to dark or grey-green leaf surfaces appear quilted from the bulges in the blade between the sunken veins. The lateral veins ascend from the midrib. Leaves become up to 3 cm long.
The leaves are often hysteranthous, i.e. dry when the plant flowers, growing in another season (Vlok and Schutte-Vlok, 2010; iSpot; www.pelargonium.si).