Diascia 'Diamond Dark Orange'

RHS Plant Profile
twinspur 'Diamond Dark Orange'

Save a plant

Where do you want to save Diascia 'Diamond Dark Orange'?

Plants I own
Wishlist
Go to My Plants
twinspur 'Diamond Dark Orange' RHS
twinspur 'Diamond Dark Orange' RHS
Bedding Herbaceous Perennial
Thank you - your purchase supports our charity work Buy this from RHS Plants Shop
Buy online from £6.99Buy this from Plant Nurseries
1 Suppliers

A dense, vigorous, compact semi-evergreen perennial to around 20cm in height with small, semi-trailing, oval dark green leaves. Large but delicate dark orange flowers with darker centres appear on wiry stems from summer to early autumn

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
Moist but well–drained
pH
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)
H3

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Scrophulariaceae
Native to GB/Ireland
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
Accepted

How to Grow

Cultivation

Grow in fertile, moist but well-drained soil in full sun, and water in dry periods. Good for containers. Will need winter protection in colder areas. See diascia trial 2024-2025

Propagation

Propagate by taking softwood cuttings in summer

Suggested planting locations and garden types

  • Cottage and informal garden
  • City and courtyard gardens
  • Hanging Basket
  • Patio and container plants
  • Bedding
  • Flower borders and beds

Pruning

deadhead to prolong flowering, then cut down at the end of the season

Pests

May be susceptible to slugs and snails

Diseases

Generally disease-free