This species is best grown from seed. To date vegetative techniques haven't been very successful.

Sow the seed during autumn or winter in a well-draining medium. Level the medium and then sow the light seeds evenly, water gently and cover with a thin layer of sand or bark. Place in a sunny position. The seed will germinate within two to three weeks.

Prick seedlings out from the trays as soon as they are large enough to handle. Place the potted seedlings in a sheltered position, like a shade net, and gradually start introducing the plants to full sun.

In its natural environment the tontelblaar is found to grow with a variety of fynbos species including Erica spumosa, E. coccinea, E. lutea, E. sitiens, Nivenia stokoei, Agapanthus africanus subsp. africanus, Aristea capitata, Watsonia tabularis, Crassula coccinea, Pelargonium cucullatum, Protea cynaroides, Leucadendron spissifolium, L. xanthoconus, L. laureolum and L. gandogeri.

It should also perform well with most of the other larger fynbos groups such as the Cape reeds (restios), proteas, ericas and buchus.

Hermas villosa is a resprouter which in nature receives a natural trim during a fire. It will therefore become lanky after a while. Cut it back in winter to ensure the plant maintains a bushy habit and neat appearance.