Leucospermum praecox can be propagated from cuttings or seed but cuttings have a much higher success rate than seeds.

Make cuttings from December to March (summer to autumn). The cuttings should be semi-hardwood, 60-100 mm long, and taken from the current season's growth. Dip the cuttings into a rooting hormone solution or hormone powder and plant into a medium of 50% polystyrene and 50% finely milled bark. Place in a growing house with bottom heat (25ºC) and intermittent mist. Once the roots are well developed, remove from the mist unit and harden off for three weeks. Plant the cuttings into small bags and grow on until ready to plant into the garden.

Sow seed at the end of February when the days are warm and the nights start to cool down (late summer to autumn). Soak Leucospermum seed in smoke water to which hydrogen peroxide has been added, at the ratio of 1% of the total volume for 24 hours. This loosens the outer seed coat and oxygenates the seed. The softened seed coat is rubbed off. Dust the seed with a systemic fungicide. Sow on a well-drained medium consisting of 1 part loam, 1 part bark, and 2 parts sand, firm down and cover with a layer of sand or finely milled bark. Seed can be sown in an open seedbed, or in a seed-tray placed in a sunny position. Germination begins after three to four weeks. Once two true leaves have grown, prick the seedlings out into small bags. The seedlings will have to be pricked out in batches, as the seeds germinate at different times. Place the seedlings in a lightly shaded area with good air circulation. When plants are ± 50-100 mm tall or after one year's growth, they can be planted into the garden. Nipping out the tips of the seedlings will encourage branching and produce a neater shrub.

The best time to place the young plants in the garden is just before the rainy season. This enables plants to establish themselves and send down deep roots before the hot, dry, summer season. Leucospermum praecox requires a sunny situation with well-drained soil. In nature the plants grow together in large monospecific stands producing an amazing flowering display; one would require a very large garden to recreate this effect! You could plant them in a rambling informal indigenous shrubbery using companion plants such as Elegia capensis, Leucadendron salignum, Euryops annae, Aloe arborescens, and Erica cerinthoides.

Leucospermum praecox will grow in most well-drained garden soils. It will grow in alkaline soil but will thrive in acid soil. Being a fast grower it will flower in the second year after planting. As the plants grow and flower you can cut flowers for the vase. This will prune the plants at the same time.

Leucospermum praecox is relatively hardy and not susceptible to too many diseases and pests in a garden situation. The most important factor in preventing disease in proteas is to make sure the environmental conditions are correct. This includes getting direct sunlight for most of the day, a well-drained soil which does not stay saturated and will not stagnate, and good air circulation ensuring that the above-ground parts of the plant dry quickly after watering. It is also important to ensure that the soil stays cool in the hot months and that roots are not disturbed by digging. A thick layer of mulch or groundcover planting can be used to keep the soil cool and prevent moisture loss. If any of these factors are not correct, the plants become weakened and stressed, and you can be sure to attract some form of pest or disease.