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Herbaceous PerennialBogs

Trollius × cultorum 'Etna'

An upright, clump-forming perennial, up to 75cm high, with glossy, deeply divided and toothed green leaves. Double, cup-shaped, rich golden yellow flowers are borne on upright stems in late spring to early summer

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Ultimate height

0.5–1 metres

Time to ultimate height

2–5 years

Ultimate spread

0.5–1 metres

Clay

Loam

Moisture

Moist but well–drained, Poorly–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun
Partial shade

Aspect

East–facing or South–facing or West–facing

Exposure

Exposed or 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)

Botanical details

Family: Ranunculaceae
Native to GB / Ireland: No
Foliage: Deciduous
Habit: Clump forming, Columnar upright
Genus: Trollius are herbaceous perennials which form a clump of palmately lobed leaves, with erect stems bearing solitary, yellow, globose or bowl-shaped flowers composed of several petal-like sepals surrounding much-reduced nectar-bearing petals
Name status: Unresolved

How to grow

Cultivation

Grow in deep, preferably heavy, moist soil that does not dry out, in full sun or partial shade. Cut back hard after flowering and apply a balanced liquid fertiliser to encourage further blooms

Propagation

Propagate by division as new growth begins in spring

Suggested planting locations and garden types

Cottage and informal garden
Wildflower meadow
Low Maintenance
Cut flowers

Pruning

Cut back hard after flowering

Pests

Generally pest-free

Diseases

May be susceptible to powdery mildews

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