loading

Eryngium giganteum 'Silver Ghost'

giant sea holly

Product Image
Teasel-like pale green flowers, which turn to steely-blue as they mature, are surrounded by 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. This plant is a biennial, but self-seeds freely. It's also ideal for use in dried flower arrangements.

How to care for Eryngium giganteum Silver Ghost:

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.
Flowering period:
  • Jan
  • Feb
  • Mar
  • Apr
  • May
  • Jun
  • Jul
  • Aug
  • Sep
  • Oct
  • Nov
  • Dec
Eventual height:
0.6m
Eventual spread:
0.4m
Position:

Full sun

Rate of growth:

Average

Soil:

Moderately fertile, moist, well-drained soil

Hardiness:

Fully hardy

  • InformationThis perennial dies back to below ground level each year in autumn, then fresh new growth appears again in spring.

Product options

Product options image
RH30002134
9cm pot
£12.99
available to order from summer
Product options image
RH30002178
3 × 9cm pots
£29.99 £10.00 each
available to order from summer
Delivery options (pick your preferred option at checkout)
Standard delivery Standard Delivery£5.95

Goes well with

Become an RHS Member today and save 25% on your first year