Amethyst sea holly Eryngium amethystinum

ABOUT
E. amethystinum is a semi-evergreen, clump-forming perennial to around 70cm tall forming a rosette of divided basal leaves. Egg-shaped to rounded, steel blue flowerheads to 2cm long are borne on upright, branching stems often also coloured a deep blue; each flowerhead is surrounded by spreading blue-silver bracts
About this plant
Names
Family
Apiaceae
Synonyms
amethyst sea holly amethyst eryngo Italian eryngo see more
Characteristics
Foliage type
Semi-evergreen
Height
0.5-1 metres
Spread
0.1-0.5 metres
Hardiness zones
H5
Light
Full Sun
Pruning
Although you can cut back flower stems after flowering the seedheads are a very attractive feature so are usually left over winter
Soil
SoilChalk, Loam, Sand
Suitable locations
Hardiness zone
Drought Resistant Cut Flowers Flower borders and beds Banks and Slopes City & Courtyard Gardens Coastal Gravel Garden Patio & Container Plants Architectural Cottage & Informal Garden Prairie Planting
Propogation
Propagate by root cuttings in late winter
Pests
Can get leaf and bud eelworms
Diseases
May be affected by powdery mildews and root rot