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What are the keys to success?

Whatever the method you use to increase plants, it is essential when raising them vegetatively (for example, from cuttings and by division) that ‘mother plants’ are free from pests and diseases, as well as viruses. They should also be good examples of the species being increased. When buying seeds, ensure that they are properly labelled and not excessively old (for most species, the ability to germinate diminishes with increasing age – see page 9).