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Herbaceous Perennial

Rudbeckia fulgida var. speciosa

Newman's coneflower

A clump-forming, rhizomatous perennial to 1.4m high, with ovate basal leaves, and branching stems with narrow, serrated stem leaves. Produces flowers to 8cm across with deep-brown central cones and golden yellow ray florets, from late summer to early autumn

Other common names

showy coneflower

Synonyms

Rudbeckia newmannii
Rudbeckia speciosa

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Ultimate height

1–1.5 metres

Time to ultimate height

2–5 years

Ultimate spread

1–1.5 metres

Clay

Loam

Moisture

Moist but well–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: Asteraceae
Native to GB / Ireland: No
Foliage: Deciduous
Habit: Clump forming
Genus: Rudbeckia may be annuals, biennials or rhizomatous herbaceous perennials, with simple or pinnately divided leaves and large daisy-like flower-heads with yellow or orange rays surrounding a prominent conical disk
Name status: Unresolved

How to grow

Cultivation

Grow in humus rich, moist but well-drained soil in full sun or partial shade. Able to tolerate drought once established. See rudbeckia cultivation for further advice

Propagation

Propagate by seed, surface-sown in early spring in containers in a cold frame, or by division of established clumps in autumn or spring

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Wildlife gardens
Prairie planting
Flower borders and beds
Cut flowers

Pruning

Deadhead regularly. Can be cut back in autumn, though stems and seedheads persist well and can provide structure in winter

Pests

May be susceptible to aphids and slugs

Diseases

Generally disease-free

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