September is the ideal time to take cuttings of the popular border perennial Verbena bonariensis. In this short video clip from Gardeners' World, Monty Don takes you through the process step by step. Watch now to discover which stems make good cuttings, how to prepare them, what type of compost to plant them in, and what aftercare they need. You'll soon have lots of free verbena plants to fill your borders with colour next year.

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