About

Eryngium giganteum, Miss Willmott's ghost, is a striking, short-lived perennial or biennial with broadly heart-shaped, spiny basal leaves and, in summer, tall, branching stems clothed in silvery-grey, rigid, spiny leaves and bearing pale-blue flowerheads surrounded by large, silver-white, spiny bracts. The name commemorates the legendary gardener Ellen Willmott, who reportedly scattered seeds of it wherever she went.

About the genus

Eryngium, the sea hollies, are biennials and perennials with spiny-margined, often architectural leaves and distinctive, dome-shaped flowerheads surrounded by spiny bracts, often in metallic shades of blue, silver or purple. Drought-tolerant and ornamental, they are grown in sunny, well-drained borders.

Growing conditions

SunlightFull sun
Soil typeChalk, Clay, Loam, Sand
Soil pHAcid, Alkaline, Neutral
Soil moistureMoist but well-drained
AspectWest-facing, South-facing
ExposureExposed, Sheltered
UK hardinessH4

Plant details

Plant typeHerbaceous Perennial
HabitClump forming
FoliageEvergreen
Height1-1.5 metres
Spread0.5-1 metres
Time to full height2-5 years
Suggested usesCoastal, Cottage and informal garden, City and courtyard gardens, Gravel garden, Wildlife gardens
Native toSouth America

Care notes

CultivationGrow in moist but well-drained, fertile soil in full sun. Protect from winter wet
PruningCut back after flowering
PropagationPropagate by seed or division
Pest resistanceMay be susceptible to leaf and bud eelworms, and slugs and snails
Disease resistanceMay be susceptible to root rot and powdery mildews