Eryngium is a genus of flowering plants in the Apiaceae (Umbelliferae) family. There are about 250 species in this family. Eryngium genus can be annuals, biennials or perennials with simple or divided leaves. Leaves are often spiny edged, and cone-like flower-heads, surrounded by an involucre of conspicuous spiny bracts. The genus has a cosmopolitan distribution, mainly in South America (Argentina, Paraguay, Uruguay, Brazil), Europe and Asia including many species in Turkiye.

Eryngium pandanifolium is a herbaceous perennial plant, with erect stems up to 3 metres tall. Plant is native to the Pampas of Argentina, Uruguay, Paraguay and southern Brazil. Blue-green fleshy leaves of the plant; are sword-shaped, spiny-margined, similar to a cactus. long upright soft green leaves emirate from a large rosette to about 90 centimetres tall by 90 centimetres wide. In late summer Giant Sea Holly produces stems up to 2.5 meters, with axillary branches for their whole length, bearing many small, round, greenish-white flowers. They become red-purple fruit heads, which may mature to dark brown. Old flowering stems should be cut back after they have finished.

Eryngium pandanifolium is a plant of mainly subtropical areas. It prefers neutral or acidic, moist but well drained loam, clay, sand, chalk fertile soil in full sun. Plant withstands frost, died back at -12°C only to emerge from the roots in spring. Prone to damage from slugs and snails. Giant Sea Holly susceptible to phytophthora root rot and powdery mildew.

Propagation may be done by seed, dividing clumps in spring, or taking root cuttings in late winter. A fibre is obtained from the leaves and is used locally for making a kind of rope.

 Use in Landscape: Eryngium pandanifolium is an architectural plant, allows viewer to see beyond whilst partially obscuring full view. Suggested planting locations; Flower borders and beds in architectural city gardens, coastal cottage and any informal gardens. A dry climate appearance lends it to pair with cactus, beucarneas and agaves. Also may be used as a border plant. After establishing plant needed very little water even under the full sun.