Flat Sea Holly (Eryngium planum) provides a tremendous garden presence throughout the summer that can't be overlooked with its profuse egg-shaped, steel-blue colored flowers. Its beautiful texture, unique color, long-lasting flowering, easy care and beauty in dried flower arrangements make it a favorite of gardeners. A favorite of bees too!

  • Eryngium planum is a miniature form of Eryngium, as regards its flower heads, which measure about 2 inches across (5 cm) and are blue all over. It grows in clumps of stiffly erect, branched stems, up to 3 feet tall (90 cm), which give the plant the appearance of an elegant little bush.
  • With a trend toward drier summers, Eryngium has become even more popular. Easy to please, even in dry gardens where other border stalwarts suffer, Eryngium goes from strength to strength over the entire summer, complimenting every other plants with its silver bracts.
  • Eryngium partners well with Mediterranean plants and silver foliage plants.
  • Eryngium planum thrives in full sun and enjoys drysandywell-drained soils. The sunnier the site, the more intense the blue! Tolerates poor soils. Avoid planting this plant in moist and fertile soils, where it will tend to sprawl and may require support. 
  • Drought tolerant, deer and rabbit resistant
  • Excellent choice for sun baked, informal beds and borders or natural plantings, where the steel blue flowers and foliage will superbly complement the vibrantly colored summer flowers. Ideal for small gardens. May be planted as a single specimen or in groupings. Perfect for cut or dried flower arrangements too!
  • Deadhead to preserve a neat appearance. Cut back in late summer after flowering is over.
  • Self-seeding may happen under satisfactory growing conditions, but rarely becomes a nuisance.
  • Transplants poorly and is best left undisturbed once established.