Alphabetical Plant Listing

Eryngium pandanifolium (Giant Sea Holly)

Giant Sea Holly


One of the largest of the Eryngiums, Eryngium pandanifolium (Giant Sea Holly) is an evergreen perennial forming a bold rosette of narrowly sword-shaped, spiky-margined, arching, blue-green leaves. From mid-summer to early fall, it produces tall stems bearing towering umbels of small, tight, egg-shaped reddish-purple flower heads. They may turn chocolate brown if not damaged by frost. Attractive to bees and butterflies but deer resistant, this fast-growing and imposing Sea Holly adds a dramatic architectural presence in the garden.

  • Recipient of the prestigious Award of Garden Merit of the Royal Horticultural Society.
  • Grows in clumps of stiffly erect, branched stems up to 7-8 ft. tall (210-240 cm) and 4-5 ft. wide (120-150 cm)
  • Performs best in full sun in moist, well-drained soils. Best situated in a sheltered site where it has some protection from the prevailing winds.
  • Excellent choice for beds and borders, cottage gardens and coastal gardens. May be planted as a single specimen or in groupings.
  • Cut back old flowering stems after they have finished
  • Watch for leaf and bud eelworms, powdery mildew and root rot.
  • Propagate by seed sown in containers in a cold frame as soon as ripe. Divide clumps in spring, although they may be slow to re-establish, or take root cuttings in late winter
  • Propagate by root cuttings in late winter
  • Native to South America

Learn How To Plant, Care, and Grow Spectacular Sea Holly (Eryngium)

Attractive, Sea Holly plants (Eryngium) are striking ornamental perennials grown for their arresting, thistle-like, silvery or blue tinted flower heads adorned with a ruff of showy bracts. Blooming in summer and sometimes into fall, they are exceptionally care-free plants if they are given a well-chosen site. Here are some basic rules that need to be followed to enjoy their splendid flowers.Read More

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Requirements

Hardiness 9 – 10
Heat Zones 9 – 12
Plant Type Perennials
Plant Family Eryngium - Sea Hollies
Exposure Full Sun
Season of Interest Summer (Mid,Late)
Fall
Height 7' – 8' (210cm – 240cm)
Spread 4' – 5' (120cm – 150cm)
Spacing 60" (150cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Plant of Merit, Showy, Evergreen
Tolerance Deer, Salt
Attracts Birds, Butterflies
Garden Uses Beds and Borders
Garden Styles City and Courtyard, Coastal Garden, Informal and Cottage

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Great Plant Combination Ideas with Eryngium - Sea Hollies

Guides with Eryngium - Sea Hollies


© Martin Ogden and www.teddingtongardener.com

While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 9 – 10
Heat Zones 9 – 12
Plant Type Perennials
Plant Family Eryngium - Sea Hollies
Exposure Full Sun
Season of Interest Summer (Mid,Late)
Fall
Height 7' – 8' (210cm – 240cm)
Spread 4' – 5' (120cm – 150cm)
Spacing 60" (150cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Plant of Merit, Showy, Evergreen
Tolerance Deer, Salt
Attracts Birds, Butterflies
Garden Uses Beds and Borders
Garden Styles City and Courtyard, Coastal Garden, Informal and Cottage

Great Plant Combination Ideas with Eryngium - Sea Hollies

Guides with Eryngium - Sea Hollies

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