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Sea Holly in the GardenTags plant encyclopedia

Eryngium

 

Sea Holly

Sea Holly is a strikingly attractive architectural rosette-forming plant bearing rounded deep blue flowers with a spiky collar of silvery bracts. The leaves are dark green and heart-shaped. The plant has a tap root, and needs moisture-retentive soil that drains well. It is drought-tolerant.

Contributed by @sho47

 
plant Features
  • Sea Holly likes full sun

    Full sun

  • Sea Holly likes very little water

    Very little water

  • Sea Holly is frost hardy: 23f (-5°c)

    Frost Hardy: 23F (-5°C)

  • Sea Holly likes moist and free draining

    Moist and free draining

 
Similar plants are available to buy from 5 store(s) in the UK
 
plant information

Common name

Sea Holly

Latin name

Eryngium

type

Perennial

family

Apiaceae

ph

5.0 - 7.0 Acid - Neutral

  • Light

    Sea Holly likes full sun

    Full sun

  • Frost

    Sea Holly is frost hardy: 23f (-5°c)

    Frost Hardy: 23F (-5°C)

  • Soil

    Sea Holly likes moist and free draining

    Moist and free draining

  • Water

    Sea Holly likes very little water

    Very little water

Plant & bloom calendar

  •  
    Best time to plant
  •  
    When the plant will bloom

full grown dimensions

The size of a fully grown Sea Holly is 0.50meters x 0.50meters 0.50 M 0.50 M

Eryngium

Sea Holly is a strikingly attractive architectural rosette-forming plant bearing rounded deep blue flowers with a spiky collar of silvery bracts. The leaves are dark green and heart-shaped. The plant has a tap root, and needs moisture-retentive soil that drains well. It is drought-tolerant.


Summer Flowering

From Early Summer TO Mid Autumn

Sea Holly is a strikingly attractive plant bearing rounded deep blue flowers and dark green, heart shaped leaves on upright stems in Summer. Cut hard back in Autumn

 

Planting

From Early Spring TO Mid Spring

Plant eryngiums where there is bright light, poor soil and good drainage in order to develop a strong, rigid framework and steely patina. If grown on damp, heavy soil (or in wetter parts of the country) most eryngiums stems tend to flop and become a dull, grey-green. However, eryngiums are very diverse: there are over 240 species worldwide. If you really want to grow them, try one or two in the driest hot spots you have. Some even do well on clay. Overwintering can be a problem, so choose a warm position and be prepared to protect a choice plant with fleece or straw in severe weather. These jagged plants need their own space to shine. They make a statement in a warm gravel garden planted among sun- lovers. Or use it as a plant sculpture at the forefront of a sunny, open area with bold planting behind

 
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Gardeners who are growing this plant