- Solitary flowers at the end of a 20cm-2.5m tall stem
- Alternate leaves, waxy cuticle
- Flowers are purple-red with spiny bracts surrounding the flower.
- Called ‘nodding thistle’ because the flowers droop down as they mature.
Introduction and spread
- Native to Europe
- A nodding thistle plant may produce up to 20 000 seeds
- Seeds can be transported to new areas via vehicles, equipment or clothing
- Prefers to establish on disturbed sites.
Consequences of invasion
- A problem in grasslands where grazing animals favour grasses over the thistle, giving it an growth advantage
- Outcompetes native grasses
- Creates impenetrable thickets
Status in the CKISS region
- Nodding thistle is classified as Regional EDRR on the CKISS Annual Priority List
- It has been observed at very few sites in the region.
- Measures are being taken to eradicate this species where it is found in our region, and prevent the plant from spreading to new sites.
- To learn more about how CKISS classifies and manages invasive species, see our Invasive Species Priority Lists page.
Integrated pest management options
- Be PlantWise! Choose only non-invasive plants for your garden.
- Learn to properly identify nodding thistle
- Clean equipment and gear before leaving an infested site
- Hand digging and mowing can be effective if repeated over a period of time
- Mow just before plants flower to reduce seed production.
- Transport securely and dispose of removed invasive species properly at a landfill