• Eryngium x olivierianum 'Pen Blue'. Close-up of a blue sea holly flower with radiating spiky blue petals and a green-brown textured centre.
  • Eryngium x olivierianum 'Pen Blue'. Close-up of blue sea holly flowers with spiky violet-blue petals and green foliage.
  • Eryngium x olivierianum 'Pen Blue'. Violet-blue Sea Holly flower blooms with spiky radiating petals.
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Eryngium x olivierianum 'Pen Blue'

Eryngium x olivierianum 'Pen Blue'

£15.00
£15.00
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Size

14 in stock

A striking architectural presence for the mid-border, this vibrant sea holly is prized for the intensity of its colouring, which saturates not just the flower heads but the upper stems in a vivid, metallic blue.

Unlike taller, floppier varieties, this compact selection reaches a manageable height, holding its thimble-like flower cones on stiff, branched stems that require no staking. Each flower head is surrounded by a distinctive 'ruff' of long, spiny bracts that catch the light beautifully, contrasting sharply with the mound of deeply divided, dark green foliage below.

It is a magnet for bees and butterflies in high summer and stands up well to dry conditions, making it an excellent candidate for gravel gardens or south-facing borders. While it thrives in full sun, the drainage must be sharp; it will not tolerate sitting in cold, waterlogged soil over winter.

Barnsdale tip: These plants put down a deep taproot, which makes them very drought tolerant but also means they resent being moved. Choose your planting spot carefully, as they are best left undisturbed once established to form a substantial clump.

Summer flowering. Drought tolerant. Best in a sunny and well-drained position. Height & spread: 60cm x 60cm (24" x 24").

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OVERVIEW
It's important to note that our order processing times are separate from the shipping times you see at checkout.

All orders are processed within 1 to 2 business days (excluding weekends and holidays) after receiving your order confirmation email. You will receive another notification when your order has shipped.

Live plants require proper preparation for shipment, specialist packing and courier services and as such may be subject to delay of up to twelve working days, to ensure the quality of your item.

SHIPPING RATES
Free shipping on orders over £150.
We charge a flat rate for shipping plants, no matter how many plants are ordered. Shipping charges for your order will be calculated and displayed at checkout.

INTERNATIONAL SHIPPING
We do not offer international shipping.

HOW DO I CHECK MY ORDER STATUS?
When your order has shipped, you will receive an email notification from us.

If you haven’t received your order within 3 days of receiving your shipping confirmation email, please contact us at info@barnsdalegardens.co.uk with your name and order number, and we will look into it for you.

As perishable goods, live plants cannot be returned.

Peat-free plant

This plant has been grown in peat-free compost. The compost we use at Barnsdale Gardens is mainly wood-based, mixed with some coir, with an eight to nine months slow-release fertiliser added. We have been using this compost to pot all the plants we grow for over ten years.

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