Sow the seed of Nemesia strumosa during early autumn using a well-draining medium, and place in a sunny position. Level the medium and then sow the light seeds evenly on a windless day (if outside), water gently and cover with a thin layer of sand or bark. The seed will germinate within the first two to three weeks.

Prick seedlings out from the beds or trays as soon as they are large enough to be handled.

It is sometimes required that the compacted soil in the flowering bed be loosened up and aerated. Organic fertilizer and well-rotted compost can also be added; use a rotovator or fork to work it into the soil. Level the soil out by using an iron rake. Plant the seedlings close together.

Flowering starts during August right through towards October. Seed will be ready for harvesting from September onwards.

Nemesia strumosa is ideal for mass plantings or mixed plantings with other annual species in small or larger flower beds. It also performs well in pots. There are various other annuals which either occur with this species in its natural habitat or which have been found to complement it rather well. These include: Ursinia anthemoides (marigold), U. cakilefolia and U. speciosa (Namaqua-ursinia), Senecio elegans (wild cineraria), Dorotheanthus bellidiformis (Livingstone daisy), Heliophila coronopifolia (blue flax), Dimorphotheca pluvialis (white Namaqualand daisy) and Dimorphotheca sinuata (Namaqualand daisy).