Lookalike guide
Japanese knotweed vs Bamboo
Knotweed is often called 'Japanese bamboo', yet true bamboo is a grass with very different leaves.
Bamboo (Phyllostachys and others): Running bamboo is invasive too — but handled differently.
| Feature | Japanese knotweed | Bamboo |
|---|---|---|
| Leaves | Broad shield-shaped leaves | Narrow, grass-like strap leaves |
| Winter | Dies back to brown canes | Evergreen |
| Canes | Soft, snap easily, purple speckles | Hard and woody |
Quick test
Narrow grass leaves all winter means bamboo.