Thunbergia alata Sunny Susy Red-Orange ('Sumthun 02'PBR)

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black-eyed Susan [Sunny Suzy Red-Orange]

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black-eyed Susan [Sunny Suzy Red-Orange] John Fielding

Other common names

black-eyed Susan 'Sunny Suzy Red-Orange'

Synonyms

Thunbergia alata 'Sumthun 02'PBR
Thunbergia alata red-orange

Climber Wall Shrub
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A fast-growing, tender evergreen perennial climber, often grown as an annual, with green heart shaped leaves. Dark orange flowers with a red centres appear in summer and autumn

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

1.5-2.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
1 year
Max Spread
0.5-1 metres
Max Height
1.5-2.5 metres

Growing Conditions

Chalk Loam Sand
Moisture
Moist but well–drained or Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
South–facing or West–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)
H2

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Acanthaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Climbing
Genus
Thunbergia can be annuals or perennials, often twining climbers, with simple opposite leaves and trumpet-shaped or salver-shaped flowers borne singly in leaf axils, or in racemes, in summer
Name Status
Trade

How to Grow

Cultivation

Grow in moist well drained soil in full sun with a support for the plant to climb. Dead-head regularly.

Propagation

Propagate by seed sown at 16-18°C (61-64°F) in spring, by softwood cuttings in early summer, or by layering

Suggested planting locations and garden types

  • Cottage and informal garden
  • Patio and container plants
  • Flower borders and beds
  • Climber and wall shrubs

Pruning

Minimal pruning required, see pruning group 11

Pests

May be susceptible to aphids, and to red spider mite and glasshouse whitefly under glass

Diseases

May be susceptible to powdery mildew