Pelargonium radens can easily be grown from seeds and cuttings. Cuttings can be grown at any time of the year. Take semi-mature stem cuttings and apply a rooting hormone to it to stimulate the rooting process. Dip the basal ends in a rooting hormone, and insert into a prepared hole made by a dibber or a nail to avoid damaging the ends. Place the cuttings in a coldframe to root. Rooting of this species usually takes about 3 weeks. Once the cuttings have rooted, pot them in a well-drained potting soil mix. Feed the newly rooted cuttings with a liquid seaweed-based fertilizer.

Pelargoniums can also be grown from seed in late summer and early autumn. Sow the seeds in a light, well-drained potting soil. Broadcast the seeds evenly in the seed tray, covering them with a layer of clean white sand. The depth of sowing is usually one-and-a-half times the size of the seed. Water thoroughly but gently and provide light shade. Germination usually takes place within 3 weeks. Pelargoniums grown from seed are generally more vigorous than those made from cuttings; however, they take longer to flower. Remember that plants grown from seed will show some degree of variation and if a particular form or variant is required, it must be propagated vegetatively. The plant can grow easily in a garden where the soils are fairly damp and moist. It is a relatively fast-growing, showy, long-flowering but relatively short-lived (5 years) perennial that brings spring colour to any mixed border. It can be used as a bedding plant to create a dense band of colour. It also does very well in containers or pots.