Eryngium giganteum

Sea Holly

Their tall, striking foliage and thistlelike clusters of flowers make them a favorite border or rock garden plant. Many are drought-tolerant. The summer-blooming, soft blossoms harden in prickly, long-lasting cut and dried flowers. Tops of flower spikes bloom first, while flowers on lower, side-branching stems bloom later. The blue flowers have thimblelike domes surrounded by steel-blue, petallike leaves. Need full sun and good drainage. Start by root cuttings, as they do not like transplanting, or by seed. Space plants about 1 foot apart.
Eryngium giganteum, Sea Holly
In its first year, it produces dramatic rosettes of divided leaves. In the second year, forms 4-foot-tall, erect, branched stems. Its teasel-like cones have small flowers surrounded by thorny leaflike bracts, all covered by a silvery gray bloom. Attracts bees. Plant dies after blooming, but self-sows.

Attributes - Eryngium giganteum

Plant Type: Biennial

Bloom Season: Mid Summer through Early Fall

Flower Color: Blue

Foliage: Deciduous

Height: 2 ft. to 4 ft.

Width: 2 ft.

Sunlight: Full Sun

Climate: Zones 6, 7, 8, 9, 10

Notes: Cut Flowers, Long Blooming, Low Maintenance.

Related Plants

Eryngium alpinum 'Superbum', Eryngium amethystinum, Eryngium giganteum 'Miss Wilmot's Ghost', Eryngium maritimum, Eryngium yuccifolium
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