Dianthus knappii

RHS Plant Profile
yellow pink
yellow pink RHS
Herbaceous Perennial

A short-lived perennial, growing to 40cm tall, with linear, grey-green leaves and pale yellow, toothed flowers, up to 2cm across, borne on erect stems in 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
Alkaline or Neutral

Position

Full sun
Aspect
West–facing or East–facing or South–facing
Exposure
Exposed or Sheltered
Hardiness
H5

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Caryophyllaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Bushy
Potentially harmful
Humans/Pets: Skin allergenwear gloves and other protective equipment when handling. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus
Dianthus can be annuals, evergreen perennials or subshrubs with narrow, often greyish leaves and showy flowers that are frequently fragrant
Name Status
Correct
Plant Range
E Europe

How to Grow

Cultivation

Grow in a well-drained, neutral to alkaline soil in full sun

Propagation

Propagate by seed or by softwood cuttings of non-flowering shoots in summer

Suggested planting locations and garden types

  • Coastal
  • Cottage and informal garden
  • Patio and container plants
  • Gravel garden
  • Cut flowers
  • Banks and slopes
  • Flower borders and beds
  • Garden edging

Pruning

Deadhead regularly to prolong flowering

Pests

May be susceptible to slugs and aphids

Diseases

May be susceptible to powdery mildews, a rust, a virus and fusarium wilt