Overview
Eryngium planum 'Blauer Zwerg' is a bushy, clump forming perennial in the genus Eryngium, part of the Apiaceae family, with semi evergreen foliage. It typically grows around 0.7 m tall. Eryngium planum 'Blauer Zwerg' grows best in full sun, and tolerates most soils and any pH. Its UK hardiness is rated H7. Suggested uses include gravel garden, coastal, cottage and informal garden and wildlife gardens.
About
Eryngium planum, the blue eryngo or flat sea holly, is a species of flowering plant in the family Apiaceae, native to the area that includes central and southeastern Europe and Central Asia. It is a thistle-like herbaceous perennial growing to 50 cm (20 in) with branched silvery-blue stems, and numerous small blue conical flowerheads surrounded by spiky bracts in summer.
Wikipedia contributors, CC BY-SA 4.0 — Eryngium planum
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
Growing conditions
Best soil and position for Eryngium
- Sunlight
- Full sun
- Soil type
- Sandy, Loamy, Clay
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Well-drained, Moist but well-drained
- Aspect
- South-facing, West-facing, East-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H7
Plant details
Eryngium planum 'Blauer Zwerg' size, habit and characteristics
- Plant type
- Perennial
- Habit
- Bushy, Clump forming
- Foliage
- Semi evergreen
- Height
- 0.7 m
- Suggested uses
- Gravel garden, Coastal, Cottage and informal garden, Wildlife gardens
Care notes
Pruning and caring for Eryngium planum 'Blauer Zwerg'
- Propagation
- Seed, Division, Root cuttings
- Pest resistance
- Leaf and bud eelworms, Slugs, Snails
- Disease resistance
- Root rot, Powdery mildews
Frequently asked questions
Where is the best place to plant Eryngium planum 'Blauer Zwerg'?
Eryngium planum 'Blauer Zwerg' prefers full sun. It suits exposed and sheltered positions.
What soil does Eryngium planum 'Blauer Zwerg' need?
Eryngium planum 'Blauer Zwerg' is adaptable and grows happily in most soil types, including sandy, loamy and clay. It is happy in soil of any pH. Aim for soil that stays well-drained to moist but well-drained.
How big does Eryngium planum 'Blauer Zwerg' grow?
Eryngium planum 'Blauer Zwerg' reaches a height of 0.7 m.
Is Eryngium planum 'Blauer Zwerg' hardy in the UK?
Eryngium planum 'Blauer Zwerg' has an RHS hardiness rating of H7, meaning it is fully hardy throughout the UK, tolerating temperatures below -20°C.
How do I propagate Eryngium planum 'Blauer Zwerg'?
Seed, Division, Root cuttings.
From the Fenn Plants journal
- Notes on DaffodilsWhen to plant daffodil bulbs in the UK, how deep, how to naturalise them in grass, why daffodils stop flowering (“blindness”), and why you should never mix cut daffodils with other flowers.
- Keeping Your NerveHow to garden through a heatwave — the best time to water, why deep soaks beat daily sprinkles, caring for pots and vulnerable plants, and why you can let the lawn go brown.
- Made to LastHow to clean, store and protect garden pots and planters — the frost-proof vs frost-resistant difference, winter care for terracotta and ceramic, and how to reuse a broken pot.
More in the Eryngium genus
- Eryngium agavifoliumSea Holly
- Eryngium alpinumalpine eryngo
- Eryngium amethystinumamethyst eryngo
- Eryngium bromeliifoliumpineapple-leaved eryngo
- Eryngium campestrefield eryngo
- Eryngium eburneum
- Eryngium horridumSea Holly
- Eryngium maritimumsea eryngo
