Conyza canadensis

RHS Plant Profile
Canadian fleabane

Other common names

blood stanch, colt's tail, cow's tail, horseweed, mule tail, prideweed, bitterweed, butterweed, fireweed, hogweed, horse tongue, mare's tail

Synonyms

Erigeron canadensis

Annual Biennial

An erect annual wildflower often regarded as a weed but beneficial to pollinating insects. Its upright stem to around 1m in height arises from a basal rosette of leaves in summer and bears many small (up to 3mm in diameter), yellow-centred, white flower heads on short stems

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1 year
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

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

Position

Full sun Partial shade
Aspect
South–facing or North–facing or East–facing or West–facing
Exposure
Exposed or Sheltered
Hardiness
H7

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Asteraceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming
Genus
Name Status
Correct
Plant Range
N & S America

How to Grow

Cultivation

Grows in a wide range of soil types and conditions but prefers a well-drained, fertile soil in full sun. Native to North America but widely naturalised throughout Europe and parts of the UK. It is considered to be a weed and has the potential to become a nuisance. It is not suited to garden cultivation

Propagation

Propagate by seed

Suggested planting locations and garden types

  • Wildflower meadow
  • Wildlife gardens

Pruning

No pruning required

Pests

Generally pest-free

Diseases

Generally disease-free