Aristea torulosa is best propagated by seeds, and clumps can be lifted and divided.

Sow seeds in spring, in a well-drained mix of sand and compost, cover the seeds lightly with soil and water regularly. The seeds will germinate in two to three weeks.

To propagate by division, dig up a clump, taking care not to damage the roots, then carefully divide it into separate plants by cutting off the new rhizmomes that have developed from the mother rhizome. Replant them immediately, give them temporary shade and water well for several weeks until they are established. Transplanted or repotted plants can be expected to flower from the third season after transplanting. Plant them in a soil mixture that is well-drained and receives regular watering. Light pruning is required to remove dead and diseased leaves from the plant, and to promote airflow and encourage healthy growth. 

Grow Aristea torulosa in full sun or semi-shade, in well-drained, humus-rich soil. Water thoroughly after planting but avoid overwatering as this can result in root rot if the soil is not well-drained. The best season to plant is spring, when temperatures are typically around 20°C.

Aristeas are susceptible to aphids, spider mites and caterpillars. For treatment, apply organic insecticidal soap on the plant. The common diseases that attack them are leaf spot and crown rot this can be treated or managed by removing the affected parts of the plants to encourage airflow and new growth.