Nemesia caerulea is a blue- to purple- flowered herbaceous perennial member of the family Scrophulariaceae.

[1] The plant is native to the Cape Floristic Province of southwestern South Africa, where it grows at low elevations on fully exposed north-facing and northwest-facing slopes in association with other native grasses and forbs.

[3] It produces many small flowers in shades of pink, blue and white (the Latin caerulea means "dark blue").

[5] In temperate regions it is usually grown as an annual.

The cultivar 'Sea Mist' has gained the Royal Horticultural Society's Award of Garden Merit.