This plant is easily propagated from seed and cuttings taken in spring.

Cuttings are taken in the morning when plant stems are full of water to prevent them from wilting or drying out. Make cuttings using a sharp, sterilized secateur, cut below a node, 10-15 cm long, and remove any leaves near the base and any flowers if they are present. Prepare the growing medium in a seedling tray, a mix of potting soil and washed river sand is recommended. Fill the seedling trays with the growing medium, make a small hole in which to plant the cutting, dip the base of the cutting into the powdered rooting hormone, insert the cutting stem into the hole and press to close the hole. Place the tray of cuttings in a warm area, not direct sunlight. Make sure that the growing medium is moist, be careful not to overwater since the cuttings will rot. Cuttings takes three weeks to root. To see if they have rooted check underneath the seedling tray by picking it up. Once the cuttings have rooted, they should be transplanted into plastic plant bags or pots, using the same growing medium that was used when propagating cuttings.

Sow seeds in spring or early summer, using a mixture of potting soil and washed river sand. Fill the seedling tray with the growing medium, settle and level the surface, and water well. Spread the seeds on top of the growing medium, spread them evenly and not too close to each other, cover the seeds with a light layer of the same growing medium. Place the seed tray in a warm area, not direct to sunlight, and water them. Seeds start to germinate after 10 days. Transplant your seedlings into a planting bag or pot after 2 months or as soon as they are large enough to handle, to promote the growth of the plant. Avoid leaving seedlings in the seedling tray for too long since it stunts the growth of the plant.

When planting in the garden, make sure that you harden off the young plant to prevent transplant shock, since it will be going from a protected nursery environment into direct sunlight. The best time to plant is summer. Make sure the young plants receive water until they are well established. When established. Ruellia patula can survive in dry areas, water requirement and maintenance are low.

Ruellia patula is attacked by white scale. This pest can be treated by spraying a suitable pesticide.