Cape Pond Weed

South Africa

General description

Bottom-rooted aquatic perennial. Rootstock is tuberous. Leaves are floating, linear and < 25 cm long. Flowers are white and borne on emergent spike above the water’s surface. Fruit is c. 1 cm long.

What you need to know

To help protect our environment:

  • You must not breed, distribute, release or sell Cape pond weed on Aotea/Great Barrier Island group.
  • You must not plant Cape pond weed on Aotea/Great Barrier Island group.

Auckland Council will control Cape pond weed at all sites within the Aotea/Great Barrier Island group where it is known to occur.

If you see Cape pond weed anywhere on Aotea/Great Barrier Island group, please report it to Auckland Council at

Still or flowing water bodies < 1.2 m deep.

Seeds dispersed by water.

Potentially competes with native freshwater vegetation. Stems may entangle recreational equipment.

Site Management

Follow up treated areas 3 times per year.

Recommended approaches

Do not attempt to undertake control of this species on Aotea/Great Barrier Island group. Please report to Auckland Council if seen on Aotea/Great Barrier Island group.

Physical control

Method: Dig out

Plant parts requiring disposal: All parts

Disposal options: Remove to greenwaste or landfill if practical


Biocontrol is currently not available for this species.

Community agrichemical control recommendations

Certified Handler/Experienced agrichemical user
Foliar spray emergent foliage with 100ml glyphosate green per 10L of water

CAUTION: When using any herbicide or pesticide please read the label thoroughly to ensure that all instructions and safety requirements are followed.

Search tags

RPMP status

Aotea (Eradication)
Hauraki Gulf Controlled Area Notice pest
Cape pond weed - Main species image