Sea Holly | Eryngium 'Magical Silver'
Metallic silver-blue structure
Grown by Mike's perennial specialists
UK
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Plant diary
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Sea Holly
Eryngium 'Magical Silver'
- Add phenomenal, spiky architectural drama to your borders with the highly structural, metallic silver-blue flower heads of this spectacular perennial.
- Eryngium 'Magical Silver' features deeply cut, silvery foliage and stiff, branching stems that bring an incredibly modern, contemporary edge to any planting scheme.
- This eryngium thrives in hot, sunny spots and poor, dry soils, making it the ultimate, zero-fuss hero for a low-maintenance gravel garden.
- It is an absolute magnet for bees and beneficial insects, while its spiny nature ensures it is completely ignored by deer and rabbits!
- The stunning blooms make absolutely breathtaking, long-lasting cut flowers, holding their metallic color perfectly when dried for winter arrangements.
What to expect
Supplied as
Eventual height
Eventual spread
Flower colour
Habit
Hardiness
Will this grow in my garden?
Can I grow this in a pot?
Yes, Sea Holly can be grown in a pot, but needs a deep 40cm container for its taproot.
How big does it get?
Sea Holly typically reaches a mature height of 60 cm and a spread of 40 cm.
How much sunlight does this need?
Sea Holly requires full sun for at least 6 hours a day.
What kind of soil does this plant prefer?
Sea Holly prefers well-drained, poor to moderately fertile soil.
How much watering does this plant need?
Sea Holly is drought-tolerant once established, needing water only when the top 5 centimetres of soil feel dry.
Will this plant need pruning?
Sea Holly | Eryngium 'Magical Silver' does not strictly need pruning, but regular deadheading will encourage more flowering. Cut the plant back to the base in late autumn or early spring.
How hardy is this plant?
Sea Holly is fully hardy (H5), enduring temperatures down to -15°C. It grows well across the UK, though it may need protection from severe winter wet in colder regions.
The wider garden
UK
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