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Herbaceous Perennial

Diascia rigescens
  • RHS AGM

stiff twinspur

D. rigescens is a spreading semi-evergreen perennial forming a mat of light green, broadly ovate leaves. Two-spurred, salmon-pink flowers are borne in erect spikes on stems to 45cm in height

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Size
Ultimate height
0.1–0.5 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Loam
Sand
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Pink Green
Autumn Pink Green
Winter Green
Position
  • Full sun
Aspect

East–facing or South–facing or West–facing

Exposure
Exposed or Sheltered
Hardiness
H3
Botanical details
Family
Scrophulariaceae
Native to the UK
No
Foliage
Semi evergreen
Habit
Matforming
Genus

Diascia can be annuals or semi-evergreen perennials, usually making a mat of neat foliage with racemes of cup or bell-shaped flowers, usually in shades of pink, and each with two short spurs

Name status

Correct

Plant range
South Africa

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How to grow

Cultivation

Grow in fertile, moist but well-drained soil in full sun. Can be grown in a container; water in dry periods

Propagation

Propagate by seed sown as soon as ripe or in early spring or propagate by taking softwood cuttings in summer

Suggested planting locations and garden types
  • City and courtyard gardens
  • Cottage and informal garden
  • Patio and container plants
  • Rock garden
  • Flower borders and beds
  • Garden edging
Pruning

Deadhead to prolong flowering

Pests

Slugs and snails may be a problem

Diseases

Generally disease free

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