Sow freshly gathered seeds or store them for sowing in the summer. Mix 50% sand or silica with 50% seedling mixture, which allows for good drainage. Mix the seeds with soil before sowing, or sow them first and cover with very fine soil. The container should provide good water drainage and be placed under moderate mist. The seeds will germinate within four weeks. Harden off the plants and after two weeks transplant them into 2-litre bags. In the display bed, plant the seedlings 20 cm apart in full sun. The plants may be multiplied through the splitting or division of the mother stock, but be careful not to disturb the roots.