Eryngoes, also called sea hollies, are perennial plants, occasionally annuals, with distinctive, bristly flower heads. They ...

HINT OF HAUNTED HOLLY! ‘Ghostly’ garden options give a delightful glow to autumn borders. Miss Ellen Willmott, an erudite plants-woman, would scatter invasive annual sea holly, Eryngium ...

Although Eryngium giganteum is a biennial and dies after flowering, you will have plenty of progeny thanks to the generosity of its seeding.

A small colony of Eryngium giganteum 'Miss Willmott’s Ghost’ is muscling through its horticultural neighbours, its great holly-like bracts prickly and uncompromising as its namesake.