Osteospermum jucundum 'Blackthorn Seedling'

RHS Plant Profile

African daisy 'Blackthorn Seedling'

RHS

Synonyms

Osteospermum jucundum 'Blackthorn Seedling'
Osteospermum jucundum 'Blackthorn'
Osteospermum 'Blackthorn Seedling'

Herbaceous Perennial

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A bushy perennial with narrow foliage and, from late spring to autumn, daisy-like flower-heads to 6cm across, with deep pink rays surrounding a yellow disk

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: South–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): H3
Drought Resistance: Yes

Colour & Scent

Fragrance Foliage

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Asteraceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Bushy
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: Accepted

How to Grow

Cultivation

Grow in moderately fertile, well-drained soil in full sun. Good for a sheltered position

Propagation

Propagate by seed at 18°C (64°F) in spring or take softwood cuttings in late spring. Alternatively, propagate by semi-ripe cuttings in late summer

Suggested planting locations and garden types

Coastal
Cottage and informal garden
Gravel garden
City and courtyard gardens
Patio and container plants
Rock garden
Flower borders and beds
Garden edging
Ground cover

Pruning

Deadhead regularly to prolong flowering

Pests

May be susceptible to aphids

Diseases

May be susceptible to Verticillium wilt