The flowers of Pelargonium acetosum grow in small umbels of two to seven. The pedicels are short, the calyx tube 4 cm long. The sepal lobes are narrow, pointed and veering away from the corolla.
An upper pair of narrow, oblanceolate petals oppose three similarly shaped lower ones. Flower colour is pale salmon pink to about white. Darker salmon lines are usually present on the lower halves of the upper petals.
The cluster of stamens cohering in front of the flower centre have white filaments that turn up near there tips where they hold up orange to brown anthers.
Flowering happens all year round (Vlok and Schutte-Vlok, 2015; Bond and Goldblatt, 1984; iNaturalist; http://pza.sanbi.org).