Picking a border theme, for example by colour, is a great way to ensure it has a sense of cohesion. In this video clip, Monty Don plants Astrantia 'White Giant', Cosmos 'Purity' and bishop's weed, Ammi majus – all of which have white flowers.

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Verbena bonariensis, Leucanthemum ‘Crazy Daisy’, Dianthus barbatus Mix, and Aquilegia Mrs Scott-Elliot hybrids.

24 free* wildlife-friendly perennials (worth £27.56)

Includes Verbena bonariensis, Leucanthemum ‘Crazy Daisy’, Dianthus barbatus Mix, and Aquilegia Mrs Scott-Elliot hybrids.

*Just pay £5.95 postage to receive 24 FREE wildlife-friendly perennials (6 plugs of each variety).

Offer ends 23.59, Tuesday 15 July.
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