Eryngium planum Magical Symphony ('Kolmasy') (Magical Series)

RHS Plant Profile

blue eryngo [Magical Symphony]

Synonyms

Eryngium planum 'Kolmasy'

Herbaceous Perennial

Buy this from Plant Nurseries
2 Suppliers

A robust clump-forming perennial with rounded, dark green basal leaves and upright, branched stems bear deeply-lobed, blue-tinged, spiny leaves and small, green flowerheads maturing to blue, providing flowers in two colours at the same time, and narrow, spiny blue-green bracts 2.5cm long, in mid to late summer

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 1–2 years
Max Spread: 0.1-0.5 metres
Max Height: 0.5-1 metres

Growing Conditions

Chalk Loam Sand

Moisture: Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun

Aspect: West–facing or South–facing
Exposure: Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H5
Drought Resistance: Yes

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Apiaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Clump forming
Genus: Eryngium can be annuals, biennials or perennials with simple or divided leaves, often spiny edged, and cone-like flower-heads often surrounded by an involucre of conspicuous spiny bracts
Name Status: Trade

How to Grow

Cultivation

Grow in dry, well-drained poor to moderately fertile soil in full sun, with protection from winter wet

Propagation

Propagate by seed in containers in a cold frame as soon as ripe; insert root cuttings in late winter; propagate by division during spring, although they may be slow to re-establish

Suggested planting locations and garden types

City and courtyard gardens
Coastal
Cottage and informal garden
Gravel garden
Wildlife gardens
Flower borders and beds
Cut flowers

Pruning

Tidy plants after flowering; ideal for flower arranging - cut the stems before the flowers are fully open

Pests

May be susceptible to leaf and bud eelworms, and slugs and snails

Diseases

May be susceptible to root rot and powdery mildews