May be invasive in some regions. Click to learn more →
Photo: AnRo0002, Public Domain
Japanese knotweed
Reynoutria japonica
herbaceous☀️ full sun💧💧 moderate waterZone 4a – Zone 9b
Japanese knotweed is a tall, fast-growing deciduous perennial with bamboo-like stems and heart-shaped leaves that produce small white flowers in late summer. It is highly invasive and spreads aggressively through rhizomes; planting is not recommended in most regions.
