Alphabetical Plant Listing

Eryngium x tripartitum (Tripartite Sea Holly)

Tripartite Sea Holly, Tripartite Eryngo


Eryngium x tripartitum (Tripartite Sea Holly) is an upright perennial with a basal rosette of coarsely toothed, gray-green leaves. From mid-summer to early fall, wiry, violet-blue branching stems bear cone-shaped, thistle-like, metallic-blue flower heads. Each flower head is surrounded by a ruff of slender, spiny, dark blue bracts. Attractive to bees and butterflies but deer resistant, this striking Sea Holly is good for cutting as well as the border.

  • Recipient of the prestigious Award of Garden Merit of the Royal Horticultural Society.
  • Grows in clumps of stiffly erect, branched stems up to 3-4 ft. tall (90-120 cm) and 20 in. wide (50 cm)
  • Performs best in full sun in fairly dry, poor to moderately fertile well-drained soils. Tolerates light shade, poor soils, drought and salt.
  • Excellent choice for gravel gardens, cottage gardens and coastal gardens. May be planted as a single specimen or in groupings. Perfect for cut or dried flower arrangements too!
  • Although you can cut back flower stems after flowering the seedheads are a very attractive feature so are usually left over winter
  • Watch for leaf and bud eelworms, powdery mildew and root rot.
  • Propagate by root cuttings in late winter

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 5 – 8
Heat Zones 5 – 8
Plant Type Perennials
Plant Family Eryngium - Sea Hollies
Exposure Full Sun
Season of Interest Summer (Mid,Late)
Fall
Height 3' – 4' (90cm – 120cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 20" (50cm)
Water Needs Low
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Dried Arrangements, Cut Flowers, Plant of Merit, Showy
Tolerance Deer, Drought, Dry Soil, Salt
Attracts Birds, Butterflies
Garden Uses Beds and Borders
Garden Styles Coastal Garden, Gravel and Rock Garden, Informal and Cottage, Mediterranean Garden, Prairie and Meadow

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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 5 – 8
Heat Zones 5 – 8
Plant Type Perennials
Plant Family Eryngium - Sea Hollies
Exposure Full Sun
Season of Interest Summer (Mid,Late)
Fall
Height 3' – 4' (90cm – 120cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 20" (50cm)
Water Needs Low
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Dried Arrangements, Cut Flowers, Plant of Merit, Showy
Tolerance Deer, Drought, Dry Soil, Salt
Attracts Birds, Butterflies
Garden Uses Beds and Borders
Garden Styles Coastal Garden, Gravel and Rock Garden, Informal and Cottage, Mediterranean Garden, Prairie and Meadow

Great Plant Combination Ideas with Eryngium - Sea Hollies

Guides with Eryngium - Sea Hollies

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