The flowers of Plectranthus strigosus grow in short, erect, terminal racemes. There are small bracts below the pedicels on the stem. The two-lipped, green calyx ends in five acutely pointed lobes that in picture veer away from the corolla.
The white corolla, also two-lipped, is tubular at the base, the lower lip porrect (protruding forward), while the upper one veers up. The outside of the corolla is softly white-haired, the inside of the lower lip faintly dark-dotted. There are four stamens (iNaturalist; http://pza.sanbi.org).