Eryngium pandanifolium
Giant 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. Giant Sea Holly, is a magnificent rosette-forming triffid of a thing with long sword-like silvery glaucous-green leaves and heads of little dark red flowerheads on upright stems.
Contributed by @tygger
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Full sun
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Very little water
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Frost Hardy: 23F (-5°C)
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Moist and free draining
Common name
Giant Sea Holly
Latin name
Eryngium pandanifolium
type
Perennial
family
Apiaceae
ph
5.0 - 7.0 Acid - Neutral
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Light
Full sun
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Frost
Frost Hardy: 23F (-5°C)
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Soil
Moist and free draining
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Water
Very little water
Plant & bloom calendar
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Best time to plant
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When the plant will bloom
full grown dimensions
0.50 M
0.50 M
Eryngium pandanifolium
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. Giant Sea Holly, is a magnificent rosette-forming triffid of a thing with long sword-like silvery glaucous-green leaves and heads of little dark red flowerheads on upright stems.
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
joanboston
tygger