Cirsium acaulon

RHS Plant Profile
dwarf thistle
dwarf thistle visionspictures.com

Other common names

stemless thistle, ysagallen ddigoes

Synonyms

Carduus acaulis, Cnicus acaulis, Cnicus dubius Willd.

Herbaceous Perennial

A low-growing perennial, with a spreading rosette of stiff, spiny, divided glossy green leaves. In summer, produces thistle-like flowers that are usually solitary and stemless, with clusters of tubular, violet-coloured petals, and are followed by fluffy white seed heads

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

Up to 10 cm

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1–2 years
Max Spread
0.1-0.5 metres
Max Height
Up to 10 cm

Growing Conditions

Chalk Clay Loam Sand
Moisture
Moist but well–drained or Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
South–facing or West–facing
Exposure
Exposed or Sheltered
Hardiness
H6

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Asteraceae
Native to GB/Ireland
Yes
Foliage
Deciduous
Habit
Matforming
Genus
Cirsium may be biennials or perennials with spiny leaves and typical thistle-type flower-heads
Name Status
Correct
Plant Range
Europe to C Asia

How to Grow

Cultivation

Thrives in full sun, particularly on chalk and limestone but will tolerate any well-drained soil; often found on grazing sward where it benefits from shorter grass coverage

Propagation

Propagate by seed

Suggested planting locations and garden types

  • Wildflower meadow
  • Wildlife gardens

Pruning

deadhead if seed is not required

Pests

Generally pest-free

Diseases

May be susceptible to Powdery mildews