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Eryngium planum ‘Blaukappe’
at Digging Dog

Eryngium planum Blaukappe


Sea Holly

Dynamic is a rare adjective to apply to a plant, but it’s the best we can think of to describe Eryngium. From its leathery lobed leaves to the spiny, decorative bracts that host the flower, the Sea Holly has a sense of movement that is up and out. Excellent in fresh or dried arrangements, the flowers are borne on tall, branching stems, and the terminal blooms hold their color while lateral flowers develop, until the entire stem is covered with mature blossoms.

Eryngiums love well drained soil in the open sun, and are an arresting addition to the mixed border, especially when planted amidst Rudbeckia, the Achilleas, and grasses.

Eryngium planum ‘Blaukappe’ full sun

With silvered, narrow spiky ruffs that cradle metallic blue round flower heads, ‘Blaukappe’ makes a sterling addition to dried or fresh bouquets. The vividly colored “blue caps” crest stiff-branched, sturdy bluish stems arising from a handsome green basal rosette of coarsely toothed, rounded and leathery foliage. Let its fantastic mercury-hued accents temper the bronzed blades of Stipa arundinacea.

Blooms June–September.

Size: 2'–2-1/4' high x 18" wide; hardy to zone 4.

Eryngium planum ‘Blaukappe’ (P-0159)
Each $7.50
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Other selections in this genus

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Current Staff’s Favorite Plant

staff favorite plant

Our favorite plant this week: We love Astrantia major 'Lars' for it's ornate, richly colored blooms, that look great in an arrangement, either fresh or dried. Celebrating bright and cheerful colors, crowns of maroon bracts deliver gorgeous cherry red floral mounds with lighter pink centers. ‘Lars’s blooms loll high above broad deep green lobed leaves on slender stems. This energetic Danish cultivar looks a bit like an overly exuberant Italian Flat Parsley and makes an unparalleled up-front cottage-style filler that is easy to care for.

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“As a customer of many years' standing, long before online gardening was even possible, I can testify that the plants from Digging Dog have been consistently healthy and hardy through the years. They are also the biggest plants I've ever received by mail. Enormous root systems!”

~Zuzu in California

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