Propagate Erica thomae from semi-hardwood heel cuttings, and make the cuttings 40-50 mm long. Nodal cuttings can also be used, however, heel cuttings proved to be more successful. Make sure to select healthy plant material to prevent combatting fungal infections and other pests at a later stage. Use a rooting medium of fine-milled bark and perlite balls at a 50:50 ratio to ensure the medium is well drained. Place the cuttings on a propagation bench kept at 24°C to enhance root development.

Transplant rooted cuttings into small pots using 7 parts milled bark and 3 parts sand. Propagating by cuttings is a much faster method, compared to sowing seeds, to develop a successful young plant. Place the cuttings in a hardening-off area for a month before exposing them to open environmental conditions. The cuttings can be successfully planted out after three months.

Soak seeds in a fynbos smoke extract to break the dormancy, this will speed up germination which usually takes up to eight weeks. Prepare 100 mm deep seed trays to sow the seeds in by filling them with river sand and sifted composted bark at a 50:50 ratio. Mix the seeds with dry river sand and spread the mixture evenly on top of the medium, this method will prevent seeds from being planted too densely. Water the medium lightly, to prevent washing the seeds out of position, and shelter from direct sunlight. Feed the young seedlings with an organic liquid fertiliser every second week.

Grow the plants in a full sun position in the garden, they must have good drainage and maintain enough space between them to provide ventilation, this will discourage the growth of fungal disease. Prune the plant regularly after flowering, pruning to encourage new growth and will get rid of damaged or dead wood. Do not use a garden fork or spade to cultivate near the root zone of the plant use hand tools because the hairlike roots can be easily damaged. Weeds can be controlled by adding mulch to the plant beds, which will also reduce water evaporation. Erica thomae can also be grown successfully in rock gardens.

Control mealybug on young plants using an organic pesticide, or a systemic pesticide added to the medium. Manage the drainage of containers to prevent root disease.