Overview
Eryngium proteiflorum is a clump-forming, upright and branching; some form basal rosettes perennial in the genus Eryngium, part of the Apiaceae family, with deciduous or evergreen; leathery, often spiny, sometimes marbled or silver-veined foliage. Eryngium proteiflorum grows best in full sun, and tolerates most soils and neutral to alkaline pH. Its UK hardiness is rated H4-H7. Suggested uses include gravel gardens, rockeries, borders, drought-tolerant gardens and coastal gardens.. It is native to Mexico.
About
Eryngium proteiflorum is a perennial in the Apiaceae with protea-like flower heads and an upright, clump-forming, branching habit. Leaves are leathery and often spiny, sometimes marbled or silver-veined, with some plants forming basal rosettes. Native to Mexico, it flowers from June to September and demands full sun. Plant on sharply drained sand, chalk or gravel in a south- or west-facing, exposed position because winter wet is fatal.
About the genus
Eryngium is a genus of flowering plants in the family Apiaceae. There are about 250 species. The genus has a cosmopolitan distribution, with centres of diversity in the western Mediterranean, South America and Mexico.
Wikipedia contributors, "Eryngium", CC BY-SA 4.0 — Eryngium
In the garden
Eryngium proteiflorum belongs to the Apiaceae and comes from Mexico; its common name refers to the protea-like form of the flowerheads that appear above the foliage. The plant is clump-forming and upright, with leathery, often spiny leaves that may show marbling or silver veining. Flowering runs June to September, providing a mid-summer to early-autumn presence in the border. For culture give it as much sun as possible and the sharp drainage it requires: poor to moderately fertile sand, chalk or gravel are ideal, with a soil pH on the neutral to alkaline side. Soil should be well drained to dry; do not tolerate winter waterlogging. Place on a south- or west-facing site where it will be exposed rather than shaded. Hardiness H4–H7 (average to fully hardy) means the plant will withstand ordinary UK winters provided the soil is not winter-saturated. Use Eryngium proteiflorum in gravel gardens, rockeries, borders and drought-tolerant or coastal schemes where exposure and drainage are available. Its spiny, leathery foliage and extended flowering period suit sunny, sharply drained positions. Flowers appear June to September.
Growing conditions
Best soil and position for Eryngium
- Sunlight
- Full sun
- Soil type
- Poor to moderately fertile, sharply drained sand, chalk or gravel
- Soil pH
- Neutral to alkaline
- Soil moisture
- Well drained to dry; winter wet is fatal
- Aspect
- South or west facing
- Exposure
- Exposed
- UK hardiness
- H4-H7
Plant details
Eryngium proteiflorum size, habit and characteristics
- Plant type
- Perennial
- Habit
- Clump-forming, upright and branching; some form basal rosettes
- Foliage
- Deciduous or evergreen; leathery, often spiny, sometimes marbled or silver-veined
- Suggested uses
- Gravel gardens, rockeries, borders, drought-tolerant gardens, coastal gardens.
- Native to
- Mexico
Care notes
Pruning and caring for Eryngium proteiflorum
- Cultivation
- Give them the hottest, poorest, best-drained position in the garden. Rich soil produces soft growth that flops and rots, so resist feeding. Most resent disturbance because of a long taproot, which is also what makes them genuinely drought-tolerant once settled - plant young and leave alone. Excellent in gravel gardens and on thin chalk.
- Pruning
- Cut spent stems back in early spring rather than autumn, since the dried heads are among the best winter silhouettes in the border.
- Propagation
- Sow seed fresh in autumn, as germination becomes erratic once stored. Root cuttings taken in winter are the reliable route for cultivars; division rarely succeeds given the taproot.
- Pest resistance
- Slugs damage young growth, particularly on the rosette-forming species; otherwise little troubled.
- Disease resistance
- Healthy where drainage is adequate. Root and crown rot follow winter waterlogging, which is by far the commonest cause of loss.
Frequently asked questions
How do I grow Eryngium proteiflorum?
Give them the hottest, poorest, best-drained position in the garden. Rich soil produces soft growth that flops and rots, so resist feeding. Most resent disturbance because of a long taproot, which is also what makes them genuinely drought-tolerant once settled - plant young and leave alone. Excellent in gravel gardens and on thin chalk.
Where is the best place to plant Eryngium proteiflorum?
Eryngium proteiflorum prefers full sun. It suits exposed positions.
What soil does Eryngium proteiflorum need?
Eryngium proteiflorum is adaptable and grows happily in most soil types, including poor to moderately fertile, sharply drained sand and chalk or gravel. It prefers neutral to alkaline soil. Aim for soil that stays well drained to dry; winter wet is fatal.
How do I prune Eryngium proteiflorum?
Cut spent stems back in early spring rather than autumn, since the dried heads are among the best winter silhouettes in the border.
Is Eryngium proteiflorum hardy in the UK?
Eryngium proteiflorum has an RHS hardiness rating of H4, meaning it is hardy through an average UK winter, tolerating -10 to -5°C.
How do I propagate Eryngium proteiflorum?
Sow seed fresh in autumn, as germination becomes erratic once stored. Root cuttings taken in winter are the reliable route for cultivars; division rarely succeeds given the taproot.
More in the Eryngium genus
- Eryngium agavifoliumSea Holly
- Eryngium bromeliifoliumpineapple-leaved eryngo
- Eryngium eburneum
- Eryngium horridumSea Holly
- Eryngium planum 'Blaue Kappe'Blue Eryngo
- Eryngium planum 'Seven Seas'Blue Eryngo
- Eryngium serraSea Holly
- Eryngium variifoliumvariable-leaved eryngo
