The pointy petals of sea holly (Eryngium maritimum) reinforce the angularity of the spiky foliage of an African blue lily (Agapanthus ‘Storm Cloud’) and the radiating leaf lines of a sweetgum (Liquidambar styraciflua ‘Gumball’). These purple flowers perform double design duty, also serving as a color complement to the yellow blooms of Euphorbia palustris ‘Zauberflöte’. Kerry Becker designed this combination for the perennial border at the Bellevue Botanical Garden in Seattle, Washington.

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