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

Be a little more adventurous in 2017.Three head-turning perennials Washington gardeners should try this year ...

Her favorite plant was the handsome, silvery bluish-green sea holly Eryngium giganteum ‘Bieberstein.’ As she toured gardens, she would secretly scatter the seedlike fruitlets of the plant.

Miss Ellen Willmott, an erudite plants-woman, would scatter invasive annual sea holly, Eryngium giganteum, on people's gardens when they weren't looking.

The star, though, is the biennial Eryngium giganteum - often known as Miss Willmott's ghost, because it always appeared two years after the celebrated gardener Ellen Willmott (1869-1934) had ...

Although Eryngium giganteum is a biennial and dies after flowering, you will have plenty of progeny thanks to the generosity of its seeding. But there are other eryngiums that are great for the ...

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.