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Herbaceous Perennial

Rudbeckia laciniata 'Starcadia Razzle Dazzle'

coneflower 'Starcadia Razzle Dazzle'

A herbaceous, clump-forming perennial to 1.5m in height with single, daisy-like, yellow flowers and conical centres which turn brown as they age. Flowers from midsummer through to early autumn

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Ultimate height

1–1.5 metres

Time to ultimate height

2–5 years

Ultimate spread

0.1–0.5 metres

Clay

Loam

Moisture

Moist but well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

West–facing or South–facing or East–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)

Botanical details

Family: Asteraceae
Native to GB / Ireland: No
Foliage: Deciduous
Habit: Columnar upright
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: Accepted

How to grow

Cultivation

Suitable for larger gardens. Spreading rhizomes means it can have invasive tendencies

Propagation

Divide plants by separating rhizomes in spring or late autumn

Suggested planting locations and garden types

Prairie planting
Cottage and informal garden
Wildflower meadow
Flower borders and beds

Pruning

Cut back in autumn

Pests

Generally pest-free

Diseases

Generally disease-free

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