Invasive Species Council of British Columbia
Invasive Plant

Yellow loosestrife

Lysimachia punctata
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Contact with this plant may cause skin irritation or an allergic reaction.

About This Species

Yellow loosestrife is a tall, fast-spreading perennial plant. It was introduced to North America as a garden ornamental from its native range of Europe and has since escaped and become invasive. Yellow loosestrife prefers moist soils, and is typically found in wet roadsides, ditches, along shorelines and wetlands. It spreads through seeds and rhizomes, forming dense clumps that cover large areas, crowding out native plants. These monocultures reduce biodiversity and degrade habitat for waterfowl, wildlife, birds and fish.  

How to Identify

Yellow loosestrife is a tall, perennial plant that grows 60-150 cm tall with sturdy, hairy and dotted stems.  

Flowers are loose spikes of bright yellow star-shaped flowers that bloom in early to mid-summer.  

Leaves are light green, with serrated edges, and range from 3-10 cm long forming a bushy clump. 


Take Action

Prevention is the best approach.

Clean, Drain, Dry

Learn about best practices

The Clean Drain Dry program empowers you to help reduce the spread of invasive plants and organisms to BC waters by following the clean, drain, dry procedure on all watercraft and equipment.

Play Clean Go


Learn about best practices


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Observe and report to protect BC’s biodiversity

Report through this website

Use our form to tell us what you’re seeing and where.



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