Buddleja davidii
SUMMARY
What's the problem?
- Causes damage to hard surfaces
- Invasive
- Rapid growth/spread
- Difficult to eradicate seed bank - can take years
- Erosion of river banks
- Impedes growth of other species
- 3 million seeds per annum
- Will colonise a new area within two years of seeding
What are the legal implications?
- There are currently no legal obligations
What does it look like?
In Detail
Buddleja or as it is often spelt Buddleia is often referred to as the Butterfly bush because, as the name suggests of its attractiveness to butterflies. It is a much favoured popular species for garden plant.
Many plants have managed to escape gardens and colonise open ground and can self sow on waste ground and old masonry.
Buddleja is thought to be a native plant to China, but is also native to other climates in the world such as Africa.
The plant was named after Botanist Reverend Adam Buddle, who first introduced in England. The plant was named in his honour after his death in 1715.
Buddleja is found around the UK and can commonly be seen along railways, growing from old masonry structures such as bridges and derelict sites. The plant is now undergoing a reputation reconstruction, as is now considered invasive in the UK, New Zealand and Australia.
Buddleja occurs in open and disturbed sites like railways, building sites, walls, cliffs, wastelands and ruins. It produces small seeds that are easily distributed. The seeds fall within a few metres of the parent plant and can be transported by:
- Vehicles, particularly along roads and railways
- Wind
- Animals
- Water currents
- Movement of contaminated soil
- Poor management strategies
The seeds remain dormant in soil for several years and will germinate when conditions are favourable.
Identification:
- Shrub between 1 and 5 metres in height
- -There are over 100 species most of which are shrubs; the largest of species can reach over 30 m tall.
- Foliage semi erect and falling
- Large oval leaves
- Flowers white to crimson depending on variety
- Flowers July to October
Buddleja or buddleia?
The naming of Buddleja can cause some perplexity due to the different spelling. It is thought that this is because there is some confusion over the botanic name. The spelling of ‘Buddle’ in botanical Latin would be ‘Buddleia’. However the Botanist Linnaeus wrote it down as ‘Buddelja’. Today the spelling ‘Buddleja’ seems to be the preferred option.
Control method
Usually the most effective method of treatment is to directly inject/plug herbicide into the plant. Care must be taken when treating plants that are emerging from existing masonry and structures.
