Paranomus sceptrum-gustavianus is an easy to grow species and they are cultivated successfully in the Western Cape. It is drought tolerant once established and it can withstand frost, although young plants need to be protected. They grow well in a sunny position and in well-drained and acidic soil containing plenty of compost and peat to give good flowering performance. As with all Proteaceae, fertilisers should be avoided, as their (generally considered) normal levels of phosphorus can harm the plants. They have a specially adapted system of fine roots that will develop to seek out available nutrients in the soil. Pest and disease problems are rarely encountered and most gardeners should find this species simple to cultivate.

Paranomus sceptrum-gustavianus can be propagated from seeds or cuttings. Tip cuttings should be taken at least two months before flowering time. Cuttings should be 40 mm long. Nip off all new growth at the top. Wash cutting material with fungicide before dipping it in rooting hormone powder. The cutting medium should consist of 30% coir, 30% perlite or peat moss and 40% milled pine bark. Place trays with cuttings on a heated bench with automatic irrigation.

Sow seeds from summer to autumn in well-drained acidic soil consisting of two parts coarse river sand and one part sifted bark. Clean seeds and remove white or silvery seed coatings by rubbing them together. Soak the seeds on a prima stove . Spread seeds evenly in a tray, cover seeds with sifted river sand and water lightly. Seeds should germinate in 3–6 weeks.