Inula magnifica

RHS Plant Profile

giant inula

RHS 1999

Herbaceous Perennial

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An upright perennial to 2m tall, with branching purplish stems bearing hairy ovate leaves to 25cm long, and several deep yellow flower heads to 15cm wide in early summer

Position

Full sun

Soil Types

Loam

Max Height

1.5-2.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.5-1 metres
Max Height: 1.5-2.5 metres

Growing Conditions

Loam

Moisture: Moist but well–drained or Poorly–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): H6

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Asteraceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Bushy
Genus: Inula may be annuals, herbaceous perennials or sub-shrubs, moslty with large basal leaves and daisy-like yellow flower-heads, often with narrow ray-florets
Name Status: Correct
Plant Range: Caucasus

How to Grow

Cultivation

Grow in a deep, fertile, moist but well-drained soil in full sun. Will also tolerate boggy conditions

Propagation

Propagate by seed in spring, or as soon as ripe in autumn, and sow into containers in a cold frame. Propagate by division in spring or autumn

Suggested planting locations and garden types

Wildlife gardens
Wildflower meadow
Cottage and informal garden
Flower borders and beds

Pruning

Cut back old stems and foliage as the plant dies back for the winter

Pests

Generally pest-free

Diseases

Powdery mildews may be a problem in conditions that are too dry