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Common Ragwort Senecio jacobaea 

 
 
Attracts BeesBees are attracted to this plant
Attracts ButterfliesButterflies are attracted to this plant
Attracts HoverfliesHoverflies are attracted to this plant
Biennial Life CycleBiennial life cycle
Daisy-Like FlowersDaisy-like flowers
Yellow FlowersYellow flowers
Many PetalsMany petals
Jun-Nov Flowering
period
Lobed LeavesLobed leaves
Crinkly-Edged LeavesCrinkly-edged leaves
Ribbed StemRibbed stem
Tap RootTap root
90cmMaximum height
 
 
  Main image of Common Ragwort

© 2020-2025 Adrian Briggs

 

Common Ragwort is a native biennial plant of the UK, typically found growing in grassland, scrubland and hedgerows, to a mature height of up to 90cm.

The name 'Ragwort' means 'ragged plant', describing the 'scruffy' much-divided, lobed and curled appearance of the plant's leaves. The non-native Oxford Ragwort, by contrast, has very different and much 'neater' leaves, which are less divided, flatter and more open in structure.

Botanic classification and naming: Common Ragwort is a member of the Daisy (Asteraceae) family. The genus name 'Senecio' identifies the plant as a Ragwort and its species name 'jacobaea' means 'named after St James (Jacobus)'.

Concerns: Common Ragwort is toxic, causing poisoning to cattle, sheep and horses, including liver damage. Common Ragwort is listed as an 'injurious weed' under the Weeds Act 1959, meaning it is officially considered harmful to agriculture and requires control.

Benefits: Pollinated by bees, butterflies and flies. The yellow and black striped caterpillars of the Cinnabar moth mainly feed on both the leaves and flowers of Common Ragwort.

Benefits to wildlife are also indicated with orange icons in the plant profile bar at the top.

 

 
Flower of Common Ragwort

© 2021 Adrian Briggs

 

Flowers:
Common Ragwort usually flowers between June and November.

Flower colour:

Flower Colour Yellow

Yellow

Flower shape:

Flower Shape  Daisy-like

Daisy-like

Petals:

Petal Number =  Many

Many

Leaf of Common Ragwort

© 2021 Adrian Briggs

 

Leaves:

Leaf Shape:

Leaf Shape is Lobed

Lobed

Leaf Margins:

Leaf Margin is crinkly-edged

crinkly-edged

Stem of Common Ragwort

© 2021 Adrian Briggs

 

Stem and Roots:

Stem shape:

Stem Shape is Ribbed

Ribbed

Root type:

Root Type is Tap

Tap