Syncolostemon macranthus is a decorative plant that is easy to grow, and ideal for either planting in the garden or as a potted specimen. Plant them densely together for thick and compact foliage in garden beds. This species performs very well in well-drained, composted rich soil and requires occasional water in summer. Feed with an organic fertilizer to improve the plant quality, in early spring. Pinch out spent inflorescence to encourage new growth and buds. Prune the tips of the branches to control and encourage growth. Few pests attack these plants

Syncolostemon macranthus is effectively propagated vegetatively by means of cuttings from softwood or herbaceous cuttings (tip and stem cuttings), in summer. To perform a successful propagation, you need to have a sterilized pair of secateurs/cutting tool, sterilizing agent, plastic bag, root stimulant/hormone powder and healthy and disease-free, mother stock. Take cuttings at the coolest time of the day, preferably mornings, when the plant is vigorous. Collect cuttings and dip them in water to prevent shock. Prepare well-drained soil, such as river sand mixed with perlite, sifted back, vermiculite or pebbles. Sterilize soil to prevent any soil-borne diseases, then make a cutting of 80 mm cutting below the node, remove a third of the leaves from the bottom to reduce transpiration/loss of moisture. Apply a rooting hormone and set the cuttings in the medium. Keep the cuttings in a warm, humid area with good air movement and keep the soil moist, but not wet. Rooting takes place after 2–3 weeks and once well-established, transplant cuttings into containers and water regularly until they are mature. Harden off in a semi-shaded area where there is sufficient flow of air. Established plants can be transplanted into larger containers or into the garden.

Sow seeds in a controlled environment, using well-drained soil in a seed tray. Use coarse bark at the bottom of the seed tray for better drainage. Add well-drained soil on top, water the medium well before sowing, spread the seeds on the surface of the media, then slightly cover with river sand and place in warm humid area with less wind Germination should take place in 4 to 5 weeks.