Propagate Leucospermum prostratum from cuttings or seed. Cuttings will flower and be ready to plant into the garden a year after propagation, whereas seeds are scarce and will take at least two years before being large enough to plant into the garden.

Take cuttings from summer to autumn (December to March). The cuttings should be 40–50 mm long from the current season's growth. Choose vigorous, disease-free material. Dip the semi-hardwood cuttings into a rooting hormone powder and plant into a medium of 50:50 polystyrene and finely milled pinebark. Place in the greenhouse with bottom heat (± 25°C) and intermittent mist. Once the roots are well developed, remove from the intermittent mist and harden off for 2–3 weeks. Transplant into small pots using a well-drained medium made specifically for fynbos plants such as 8 parts bark to 3 parts sand. Ensure the pH is acidic to neutral, 6.5 is ideal. Grow on until ready to plant into the garden.

Sow seeds late summer to autumn (February to April). To initiate germination, seeds need alternating cold night and warm day temperatures of 4–10°C to 15–21°C. Sow the seed into a seed tray and place in a brightly lit and well-ventilated position. Use a well-drained medium consisting of 1 part bark and 2 parts sand; firm down and cover with a layer of sifted sand. Water the seed tray with a fungicide to prevent fungal disease. Germination can be erratic but should begin after 4–5 weeks. Once two true leaves have appeared, pick the seedlings out into small plugs. Place the seedlings in a lightly shaded area with good air circulation and when the seedlings are ± 50 mm tall, transplant them into small pots. When growing on, regularly monitor for disease and fungus and treat as necessary. The best time to plant into the garden is at the start of the rainy season (May to August), so that the plants can be establish before the dry hot, windy summer arrives.

Before planting apply well-rotted compost to the soil. Feed twice a year during spring and autumn with a low dose of slow-release fertilizer. Choose fertilisers that have little or no phosphorous formula. Water early in the morning while the soil is cool to avoid warm, moist conditions, as this creates favourable conditions for fungi and bacteria. Apply a thick layer of mulch to keep the soil cool and moist for a long period. Leucospermum prostratum is best suited to a fynbos garden that has well-drained soil and grows in very sandy acidic soil in nature. A sloping bank or rockery where drainage is very good, is ideal. Plant in full sun in groups of three or more to create a spectacular display. Avoid dense shrubby companion planting that will crowd it out. Good companion plants include Aulax umbellata, Erica haematocodon, Elegia equisetacea and Liparia splendens.