Eryngium giganteum 'Silver Ghost'
giant sea holly
- Position: full sun
- Soil: dry, well-drained, poor to moderately fertile soil
- Rate of growth: average
- Flowering period: June and August
- Flower colour: steel-blue flowers surrounds by silvery white bracts
- Other features: ideal for use in dried flower arrangements
- Hardiness: fully hardy
Teasel-like pale green flowers, which turn to steely-blue as they mature. are surrounded a ruff of silvery white bracts. This rosette-forming biennial is great for the front or middle of a sunny, well-drained border. The attractive foliage is displayed to best advantage if the plant is mulched with or planted in gravel. A biennial plant, it will die after flowering in its second year, but self-seeds freely in a good spot, thus ensuring more will follow.
- Garden care: Lift and divide large colonies in spring. Avoid the temptation to cut back the flowerheads in autumn as they provide interest in the winter garden.
There was a time when alliums were thought of only as vegetables. However, the taller varieties with their huge globe flower heads are now one of the stars of the architectural plant world. The stiff lollipop heads off-setting sharp vertical...Read full article