Eryngium planum ‘Blue Glitter’

(Sea holly)


Hardiness Zones:

 5a  5b  6a  6b  7a  7b  8a

Quick Overview:

?Blue Glitter? is a coarse, thistle-like, clump-forming sea holly cultivar that is particularly noted for producing an abundant crop of ?glittering? steel blue flower heads on heavily branched stems throughout summer. Although developed at least in part for the cut flower industry, this cultivar makes an excellent addition to the home garden. From basal rosettes (to 8? tall) of elliptic to oblong, cordate-based, deeply-toothed, blue green leaves (to 4? long) rise stiff silver-blue stems to 36-40? tall. Tiny, stemless, steel-blue flowers tightly packed into egg-shaped heads resembling thistles appear in profusion in summer in well-branched clusters at the stem tops. Each flower head is subtended by a narrow, spiky collar of spiny, blue-green bracts.

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Easily grown in dry, sandy, well-drained soils in full sun. Tolerates poor soils. Tall plants may sprawl, particularly if grown in overly fertile soils or in anything less than full sun. Avoid overwatering. This is a taprooted plant that transplants poorly and is best left undisturbed once established. ?Blue Glitter? may be grown from seed and reportedly will bloom first year from seed.

Additional information

Common Name

Sea holly

Botanical Name

Eryngium planum 'Blue Glitter'


1 gallon

Evergreen or Deciduous


Hardiness Zone

5a, 5b, 6a, 6b, 7a, 7b, 8a

Growth Rate


Light Requirements

Part-sun, Sun


2 to 3 ft.


1.5 ft.

Soil Condition

Dry Soils

Water Needs


Blooming Period

June to September

Flower Color




Foliage Color

blue green

Deer Resistant


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