Dimorphotheca Summersmile Yellow ('Inostyelow'PBR) (Summersmile Series)

RHS Plant Profile
African daisy [Summersmile Yellow]

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Synonyms

Dimorphotheca 'Inostyelow'
Osteospermum 'Inostyelow'PBR
Osteospermum Summersmile Yellow (Summersmile Series)PBR

Herbaceous Perennial
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A clump-forming, bushy, upright half-hardy deciduous perennial with dark green aromatic lobed leaves and bright yellow daisy-like flowers with darker yellow centres, which appear in the summer

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

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

Position

Full sun
Aspect
East–facing or South–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

Fragrance Foliage
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Asteraceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy, Clump forming
Potentially harmful
Pets (rabbits, rodents): Harmful if eaten. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus
Dimorhotheca can be annuals or woody-based, evergreen perennials with simple, alternate leaves and large daisy-like flower-heads in summer and autumn
Name Status
Trade

How to Grow

Cultivation

Grow in light, moderately fertile, well-drained soil in a warm, sunny position. In frosty areas overwinter cuttings under glass

Propagation

Propagate by softwood cuttings in late spring or semi-ripe cuttings in late summer

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Gravel garden
  • Mediterranean climate plants
  • Patio and container plants
  • Flower borders and beds

Pruning

No pruning required

Pests

May be susceptible to aphids

Diseases

May be susceptible to downy mildew and Verticillium wilt