38 Hawley Road, Earnscleugh,
Alexandra
Eryngium planum 'Sea Holly'
Blue Sea Holly
$20
19cm Pot
Mature height:
60 - 90 cm
Mature width:
30 - 45 cm
A fascinating, structural perennial with a basal rosette of heart-shaped leaves and tall, branching, metallic-blue stems. Produces unique, spiky, cone-like, deep-blue flower heads surrounded by a ruff of spiny, metallic-blue bracts.
Growing Conditions
Soil
Well-drained, poor, sandy, or stony gravelly soil.
Sunlight
Full sun is essential for the deepest metallic-blue colour.
Flower
Unique, spiky, metallic-blue flower cones with blue bracts in summer.
Care & Maintenance
Eryngium planum 'Sea Holly' is a unique, sculptural, blue-foliaged perennial that is highly drought-tolerant and hardy.
• Plant in sunny, well-draining, and gritty garden soil.
• Cut back in late autumn after flowering finishes.
• Very drought-tolerant once established in the ground.
• Hardy against frost and cold Central Otago winds.
Common Uses for
Eryngium planum 'Sea Holly'
01
Architectural Focus
Delivers a high-impact, graphic, metallic-blue structural detail in sunny garden beds.
02
Xeriscape Texture
Adds exotic, spiky, metallic, modern texture to dry, gravel-mulched layouts.
03
Pollinator Magnet
Flowers are highly attractive to bees, butterflies, and beneficial garden insects.
04
Dried Flower Display
Highly prized for long-lasting, unique, sculptural dried-flower arrangements.
Visit Us Today
We’re a local, onsite nursery located in Alexandra.
All plants are selected and purchased in person so you can see quality, size, and suitability before you buy.
38 Hawley Road, Earnscleugh, Alexandra
Opening Hours
You’re welcome to visit during our open hours, or arrange a time that suits you by appointment.
August - May:
Tue, Wed, Thu | 2:00 pm – 7:00 pm
June - July:
By Appointment Only