Rudbeckia Sunbeckia Sarah (Sunbeckia Series)

RHS Plant Profile

coneflower [Sunbeckia Sarah]

Herbaceous Perennial

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A half-hardy perennial, to around 60cm high, with oval-shaped, rough green leaves. Daisy-like flowers are produced from mid summer to autumn, with bright yellow petals brushed with brick red in the centre, and a dark brown central cone

Position

Full sun, Partial shade

Soil Types

Loam, Clay

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

Loam Clay

Moisture: Moist but well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun Partial shade

Aspect: 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): H3

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: 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: Trade

How to Grow

Cultivation

Best grown as a half-hardy annual, or with winter protection from frosts. Grows well in moderately fertile, preferably heavy but well-drained soil in full sun or partial shade. See rudbeckia cultivation for further advice

Propagation

Propagate by division in spring

Suggested planting locations and garden types

Cottage and informal garden
Patio and container plants
Coastal
City and courtyard gardens
Wildlife gardens
Cut flowers
Flower borders and beds
Bedding
Conservatory and greenhouse

Pruning

Spent flowering stems may be cut back, or left to provide winter interest

Pests

May be susceptible to aphids, and to slugs on young growth

Diseases

May be susceptible to powdery mildews, especially on dry soils