Barleria mackenii grows best under tropical and subtropical conditions. It is semi-frost-resistant and can therefore withstand a certain amount of cold weather, especially if planted in a sheltered area. A sunny spot in the garden will be the ideal position for the plants. Plant them in groups of 3-10 to create a eye-catching scene. The growing tempo is slow and plants reach maturity in 3-5 years. Light pruning in spring will encourage new growth.

B. mackenii should be planted in well-drained soils. Mix 500 g of compost with 50 g of superphosphate and work it into the soil to ensure healthy growth and soil structure. A moderate amount of water is required and these plants do rather well in the dry season, thus a perfect choice for a water-wise garden.

Propagation takes place either by seed or cuttings. It grows easily from seed. The fruit should be collected as soon as it turns brown. Don't wait too long to collect the capsules otherwise they explode and the seed is dispersed and harder to collect or lost.

The flat seeds should be planted as follows: a mixture of two parts good soil, one part compost and one part river sand is used as a growth medium. Smooth the soil over and sow the seed on the surface, pressing them slightly into the surface. Place in 40% shade and water once a week with a fine sprinkler. Germination takes place after a week. Transplant the seedlings when they are 200 mm high.

Cuttings: take cuttings from partially matured wood, 60 mm long. Use no. 2 hormone powder and a rooting medium, such as a 3:2:1 mixture of good soil, compost and river sand. The ideal temperature for root growth is 15-28º C. Place the cuttings in 40% shade.

There are no known pests or diseases.