The best way to ensure you have a continuous supply of strong, healthy plants as your pelargoniums age is to take cuttings. Most gardeners know they are among the easiest plants to propagate from cuttings, but for best results:
• Take cuttings while plants are actively growing, which can be year round in many parts of the country.
• Make cuttings about 4-8cm long using a sharp knife. Cut just above a leaf joint on the main stem and strip off most of the leaves.
• Fill pots with a mixture of two-thirds potting mix to one-third vermiculite or crushed pumice.
• Leave uncovered but don’t let them dry out. Cuttings should root within a few weeks if positioned in a light, dry location.