This hardy perennial plant grows well in enriched loamy soil, in full sun or lightly semi-shaded areas and requires no special care. When newly planted in the garden, it will require plenty of water to ensure healthy and rapid growth. Once established, it will require less water, particularly if mulch is added. Pruning is not needed as it maintains its compact and rounded habit.

It is ideal as a specimen plant grown to brighten up any patch in your garden, adding a splash of lightness and textural contrast in a mixed border, providing attractive flowers and foliage colour all year round. It can be planted in outdoor containers, as an edging plant, and in mixed borders.

Polygala gazensis is propagated vegetatively using tip or nodal cuttings, or by sowing seed; both methods can be done during either spring or autumn. 

Cuttings should be placed in a suitable rooting medium, bearing in mind that a lighter, looser-textured medium will help avoid the possibility of rotting. Rooting hormone powder can be used to increase success. Keep the cuttings in a warm, sheltered, shaded area and water enough to not let them dry out completely, but don't keep them saturated. Use a liquid fertiliser to encourage strong roots and growth until rooting occurs, which can be expected in 6 to 8 weeks. Transplant the rooted cuttings into a good soil mixture in small growing pots, with drainage holes and grow on till large enough to plant out into the garden.

Treat seed with a 12 hour soak in hot water for better germination. Sow in seed trays in a well-drained soil mix and cover lightly with the sowing medium. Keep trays in a warm, sheltered area until germination occurs. To prevent pre- and post-emergence damping off, the seed should be treated with a fungicide prior to sowing, or watered with a fungicide immediately after sowing. Transplant the seedlings after the first pair of true leaves have emerged, or when they are large enough to handle, into individual bags or pots. At this stage, feed moderately with a liquid fertiliser and water generously.

If sowing directly into open garden soil in a winter rainfall climate, then sow only in autumn to give the young plants time to establish themselves before the dry summer months. Similarly, in summer rainfall regions, sow in spring, when the rain returns.

The plant has few pest or disease problems, although if unhappy they will show significant leaf drop especially planted or positioned incorrectly. Mealy bug and aphid infestations can occur infrequently – treat with a suitable recommended pesticide.

Other recommended species are:
Polygala fruticosa ‘Southern Shores’, the southern shores butterfly bush, a neat, rounded shrub up to 1 m tall. The young leaves of this indigenous evergreen are tinged with purple, the shade echoed by the deep purple, winged flowers.
Polygala myrtifolia, the September butterfly bush, is a hardy, quick-growing coastal shrub with lime-green leaves producing masses of purple-pink flowers, mainly from spring to summer.
Polygala virgata, the purple broom, is a sparse shrub with arching branches, bearing graceful sprays of deep purplish pink flowers.