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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In Conversation at Kew Gardens
Join Adam Frost and Frances Tophill at Kew Gardens for our NEW live event, this September.
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