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18 Σεπ 2024 · Sea holly (Eryngium planum) is a perennial flower that looks like a glowing thistle, with striking steely-blue color. It is excellent for dry soils.
Learn how to grow spectacular Sea Holly plants (Eryngium) with their thistle-like, silvery, or blue-tinted flower heads. Find out the best site, soil, and watering conditions, as well as how to start from seed or transplant.
Sea hollies (Eryngium) have spiky leaves and thistle-like flowers in colours ranging from grey to intense cobalt blue, surrounded by a characteristic 'ruff'. They make striking garden plants and have excellent wildlife value, particularly for pollinators.
Learn about Eryngium planum, a perennial plant with spiky blue flowers that resemble a thistle. Find out its common names, cultivars, attributes, and landscape uses.
19 Οκτ 2022 · Which of the sea holly varieties is the most blue? While sea hollies can be bred for exquisite silvers and subtle violets, they are often most readily identifiable for their blue tones. ‘Lots of eryngiums are strikingly blue,’ say Brian and Kathy Pike, who hold the UK National Collection of Eryngiums in North Yorkshire.
These architectural, spiny, almost sculptural perennials, some looking superficially like thistles, can make a dramatic statement in a summer border. Let them rise above low-growing plants, or mingle them among roses and taller perennials to provide a contrast in form and texture.
sea holly [Big Blue] An upright, herbaceous perennial to 75cm with spiky, highly-divided, silvery-green foliage. The stiff, branched stems are topped with blue, thimble-shaped flowerheads surrounded by a ruff of prickly, silvery-blue bracts
