Eryngium 'Blue Spikes' is a herbaceous perennial cultivar of the Eryngium genus, known for its bushy, clump-forming habit and semi-evergreen foliage. Like other Eryngiums, it features cone-shaped flower heads surrounded by spiny bracts, adding architectural interest in summer and autumn. This cultivar thrives in full sun with well-drained, sandy, alkaline or neutral soil, making it suitable for gravel gardens, coastal areas, and wildlife-friendly spaces. Hardy to UK zone H5, it can be propagated by seed, root cuttings in late winter, or division in spring.

Eryngium 'Blue Spikes' is a hardy, semi-evergreen perennial with spiny blue flower heads, ideal for sunny gravel, coastal, and wildlife gardens from summer to

Eryngium 'Blue Spikes'

Eryngium agavifolium is a clump-forming member of the Apiaceae with deciduous foliage and a pronounced summer flowering period. It favours full sun and exposed positions on free-draining soils such as chalk, loam or sand. The plant tolerates a wide soil pH range and is classed H5 for UK hardiness. Use it where upright, architectural stems and reliable summer bloom are required.

Eryngium agavifolium thrives in full sun on well-drained chalk, loam or sand and flowers from June to September.

Eryngium agavifolium

Sea Holly (Eryngium agavifolium) | Gravel & Coastal

Eryngium bourgatii, the Mediterranean sea holly, is a species of flowering plant in the family Apiaceae native to Andorra, France, Spain, and Morocco. It is an herbaceous perennial, growing to 15–45 cm (6–18 in) tall.

Eryngium bourgatii, Mediterranean sea holly, is a hardy perennial suited to full sun, ideal for coastal and wildlife gardens with striking cut flowers.

https://en.wikipedia.org/wiki/Eryngium_bourgatii

Eryngium bourgatii

Eryngium causcasicum is a species in the genus Eryngium, placed in the Apiaceae. It flowers in the UK from June to September. Specific appearance, size and cultivation needs vary by provenance and cultivar, so check supplier details before planting. Growers should confirm labelled recommendations for site and soil to match the plant's requirements.

Eryngium causcasicum flowers in the UK from June to September; check supplier details for provenance and cultivation guidance.

Eryngium causcasicum

Eryngium causcasicum | Summer-flowering Eryngium

Eryngium eburneum is a flowering member of the Apiaceae genus Eryngium, notable for its structured umbels and spiny bracts characteristic of the genus. Plants in Eryngium commonly produce dome-shaped flowerheads and a distinctive architectural habit. The genus contains around 250 species with a wide, largely cosmopolitan distribution. In the UK it flowers from June to September.

Eryngium eburneum flowers in the UK from June to September and belongs to the Apiaceae genus Eryngium.

Eryngium eburneum

Eryngium eburneum | Apiaceae, blooms June–Sept

Eryngium giganteum is a clump-forming cultivar of the Eryngium genus, which belongs to the Apiaceae family. This deciduous plant thrives in full sun and is suitable for south-, west-, or east-facing aspects, tolerating exposed conditions. It prefers well-drained soils such as chalk, loam, or sand, across a range of pH levels from acid to alkaline. Hardy to UK zone H5, it is well suited to cottage and informal gardens, coastal and gravel gardens, wildlife areas, flower borders, and as cut flowers. Propagation can be achieved by seed, root cuttings, or division.

Eryngium giganteum, or Miss Willmott's ghost, thrives in full sun, is hardy to H5, and suits cottage, coastal, and wildlife gardens.

https://en.wikipedia.org/wiki/Eryngium_giganteum

Eryngium giganteum

Eryngium ovinum, commonly known as blue devil, is a herbaceous perennial in the Apiaceae family. This clump-forming, bushy plant features evergreen to semi-evergreen foliage and thrives in full sun with well-drained fertile moist soil. It is hardy to UK zone H5 and adapts well to various soil types including chalk, loam, and sand with a range of pH levels. Flowering in summer and autumn, it is suitable for architectural planting, coastal gardens, gravel beds, and as a cut flower. Propagation is by seed or root cuttings.

Blue devil (Eryngium ovinum) is a hardy herbaceous perennial with architectural appeal, evergreen foliage, and summer to autumn interest in full sun.

Eryngium ovinum

Eryngium planum 'Blaue Kappe' is an herbaceous perennial in the Apiaceae with branched silvery-blue stems carrying many small, conical blue flowerheads framed by spiky bracts. It typically reaches around 50 cm. Flowering runs from June to September, offering summer colour and architectural seedheads.

Blue Eryngo Eryngium planum 'Blaue Kappe' produces conical blue flowerheads set in spiky bracts from June to September.

Eryngium planum 'Blaue Kappe'

Blue Eryngo (Eryngium planum 'Blaue Kappe') | Summer Blue

Eryngium planum 'Seven Seas' is a herbaceous perennial in the Apiaceae with thistle-like flowerheads composed of small blue cones surrounded by spiky bracts. Stems are branched and silvery-blue, carrying the flowerheads above a basal rosette. Flowering runs from June to September. The cultivar presents a compact habit, typically suited to mid-border or gravel planting.

Eryngium planum 'Seven Seas' bears blue conical flowerheads with spiky bracts and flowers from June to September.

Eryngium planum 'Seven Seas'

Blue Eryngo (Eryngium planum 'Seven Seas') | Perennial

Eryngium x zabelii 'Big Blue' is a clump-forming, deciduous member of the Apiaceae valued for its summer flowering. It blooms from June to September. Plant it in full sun on well-drained chalk, loam or sand and place where east, west or south aspects receive direct light. Tolerant of exposed sites and hardy in most UK gardens (H5).

Eryngium x zabelii 'Big Blue' flowers from June to September and prefers full sun on well-drained chalk, loam or sand.

Eryngium x zabelii 'Big Blue'

Sea Holly (Eryngium x zabelii 'Big Blue') | Gravel & Coastal

Eryngium yuccifolium, known as rattlesnake master, button eryngo, and button snake-root, is a perennial herb of the parsley family native to the tallgrass prairies of central and eastern North America. It grows from Minnesota east to Ohio and south to Texas and Florida, including a few spots in Connecticut, New Jersey, Maryland, and Delaware.

Eryngium yuccifolium, or rattlesnake master, is a hardy perennial suited to full sun, ideal for wildlife gardens, cut flowers, and gravel borders.