Ericas grow well in nutrient-poor soils, with good drainage and a pH between 5.5 and 6.7, however, a regular feeding with an organic fertiliser at low concentrations proves to be beneficial. Well-rotted compost can be applied as mulch in the garden beds. Ericas perform optimally when their roots are not being disturbed; disturbing the roots is one of the major contributors that leads to plant shock and death. 

Regular pruning after flowering and feeding is important to encourage new growth. Ericas are relatively short-lived fynbos plants and survive on average up to between 10 and 15 years, after which they need to be replaced. Dead wood should also be removed during the pruning process, to prevent the spreading of disease.

Take cuttings in autumn, spring or early summer. Remove some leaves from the lower part of the cutting and place the cuttings in a rooting medium made up of equal parts fine bark and polystyrene chips. Heel cuttings from thin, actively growing side shoots, respond more positively when it comes to root development. Apply a rooting hormone for semi-hardwood to speed up the rooting process, which can take up to 8 weeks before signs of rooting. The cuttings develop best when good air circulation is maintained. Good air circulation is important as it reduces fungal infections. A specialised facility, such as a propagation unit with heated benches and a misting system, is often best to successfully propagate this plant by cuttings. Cuttings can be planted into small pots when rooted with a mixture of 8 parts bark and 3 parts sand. Feed every 2 weeks with an organic liquid fertiliser.

Erica unicolor subsp. georgensis is best propagated from seeds. Soak the seeds overnight in a smoke extract (usually obtained from burning fynbos plant material). This will speed up the germination process. Sow seeds in seed trays (not less than 100 mm deep) filled with 1 part river sand and 1 part sifted composted bark, in autumn. The seeds are very small and need to be mixed with fine river sand prior to sowing, in order to obtain a more even spread of the seeds. This will also prevent or at least reduce damping off, which is a result of the seedlings developing too close together. Treat the mixture with a fungicide and keep the medium moist by watering with a fine hose. Place the trays in a warm and sheltered spot to encourage the germination process. The seeds show signs of germination after 6–10 weeks.

Provide young seedlings with good light and aeration. Seedlings can be planted out into small pots as soon as they are about 10 mm high. Thereafter, plant the plants in garden beds as soon as they reach ± 100 mm tall.