Giant Reed


General description

Large robust clump forming perennial <5m high. Resembles leafy bamboo with wide leaves. Stout, knotty stems. Arching grey-green striped leaves. Feathery plume-like flowerheads mature from reddish to white.

Riparian margins, moist forest communities, coastal. Prefers moist conditions.

Pieces spread via waterways and garden dumping. Does not set seed.

Displaces all surrounding vegetation. Changes habitat by shading & impeding drainage. Gully plants heavily affected.

Site management

Controlled by grazing. Follow up frequently until eradicated. Don’t replant until 6 months after last herbicide application.

Recommended approaches

1. Cut down close to ground, dig out entire root/rhizome mass.
2. Cut stray emergent shoots at ground level, inject 10 ml undiluted Amitrole into each stem.
3. Cut down close to ground & knapsack spray regrowth (150ml haloxyfop + 50ml crop oil/10L) before it reaches 60 cm. Continue respraying at under 60 cm until regrowth ceases (may require 4-6 treatments).

Caution: when using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.

Similar species

Phyllostachys species

Bamboo has much harder canes and smaller leaves.

Phragmites australis

Phragmites is shorter and the stems are narrower in proportion to the leaves.

RPMS status

Surveillance - Whole Region
Community Initiatives - Whole Region
National Pest Plant Accord species - nationwide
giant reed - Main species image