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Germination Instructions

Sow indoors. Surface sow onto moist well-drained seed compost. Just cover with vermiculite. Propagate 18-22°C. for 2-4 weeks. Do not exclude light. Germination can be slow. Seal seed container in a polythene bag and leave for 2 further weeks, then cold stratify. Move to a fridge 4°C for 3-6 weeks. After this return to warmth but no more than 18°C. If germination does not occur within 6-10 weeks return to fridge for further 3-6 weeks. Examine regularly whilst in fridge and immediately remove any seeds which show signs of germination. Move to 8cm pots. Acclimatise and plant out after danger of frost has passed.

Growing Instructions

Prefers full sun in a light well-drained soil. Will tolerate very light shade. Plant into final position while the plant is young. The roots are often several feet long and do not like to be disturbed.

Cultivation Instructions

Flower stems may be cut back after flowering but the seedheads are attractive and could be left over winter. Cut flowers before fully open if you wish to dry them. Divide in early spring or autumn, be gentle, the plant does not like root disturbance. Protect from winter wetness. Will self-seed.

When to Sow

MarM AprA MayM JunJ JulJ AugA SepS OctO NovN DecD JanJ FebF
  • Sow Under Cover/Plant Indoors
  • Flowers/Harvest

Eryngium giganteum ‘Silver Ghost’ plants

Description

Note there is a limited quantity of these plants available. They are in 10cm pots

This plant is spectacular, with eye catching metallic silvery blue leaves, stems and flowers. Its flowers are larger than E. ‘Miss Wilmot’s Ghost’, and more silvery. It has a luminosity in the garden, and reaches its peak in late summer, when all else is becoming a bit faded and boring.

It is especially beautiful at night, in the light of the full moon. It was originally discovered in Turkish beech/pine forest. It has metallic silvery-blue leaves, and in summer it produces large heads of lovely lime-green flowers with blue stamens backed by large and conspicuous bracts, the whole later developing a shining silvery hue.

The “giganteum” refers to the flower heads which are large, and not to the plant which usually grows to approx 1.2 m high. Prefers full sun in a light well-drained soil. Will tolerate very light shade. Plant into final position while the plant is young. The roots are often several feet long and do not like to be disturbed. Flower stems may be cut back after flowering but the seedheads are attractive and could be left over winter. Cut flowers before fully open if you wish to dry them. Divide in early spring or autumn, be gentle, the plant does not like root disturbance. Protect from winter wetness. Will self-seed.
Eryngium Giganteum ‘Silver Ghost’ has won the RHS Award of Garden Merit.

Eryngium Giganteum Silver Ghost

Eryngium giganteumLatin name

The Ghost of ghosts! A very advanced version of Miss Wilmot’s Ghost being heavily frosted silver. Very impressive. 3-4′.

How to Grow Eryngium from Seed

Eryngium, or Blue Sea Holly, are highly prized by flower arrangers for their striking foliage and flower heads. Most Eryngiums, or sea hollies, need light, poor soil will good drainage to thrive and look their best. When Sea Holly is grown on damp, heavy soil it tends to become floppy and a dull, grey-green.

Eryngium has long roots that penetrate deeply in the soil, compostable growing cells are ideal since they allow young plants to be placed in their final positions whilst minimising root disturbance.

Eryngium can be sown all year round. Sow into seed trays using a good seed compost and covering lightly. Seeds may need a period of cold to break dormancy and enable the to germinate. This can be achieved naturally by placing the tray in a cold frame or unheated greenhouse, or can be simulated by placing the tray into a fridge (around 4C is ideal) for a couple of weeks. Germination is erratic, between 5 and 90 days.

As each seed germinates we would recommend that you transplant into its own compostable growing cell using gritty compost to grow on until large and strong enough to be planted out into a sunny position.

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