Docks control

Access all the information needed for control of this noxious weed, including weed identification, herbicide application and spray timings.


Docks description

Docks identification

Docks are exceedingly difficult to identify accurately in the vegetative (non-flowering) stage. Most species, including the commonly found curled dock, grow to around 1 m in height.

Docks are long-lived perennials and develop a deep taproot. They usually germinate in autumn and develop into rosettes through the winter. A flowering stem emerges in spring and the seed matures through summer. The stems usually die back during autumn and the plants over-winter as rosettes. The stems of the plant are relatively thick and hollow, usually hairless and somewhat fleshy in nature. The leaves of the plant vary in size depending on their position on the stem; however, they are usually arrow- or heart-shaped. The crown leaves at the base rosettes are typically 20–25 cm long with a rounded tip and base, while further up the stem the leaves reduce in size to become much shorter and narrower.

The flowers grow in clusters at the tip of the stem and each is made up of three small petals, growing on stalks typically around 5–6 mm long, while the fruit is a small three-sided nut surrounded by three papery segments.

Docks control

Controlling docks

The most effective means of controlling docks is to prevent infestations from establishing in the first place, as they are usually spread via human activities and machinery.

Small infestations can be removed physically from the soil. It is recommended to remove at least 20 cm below the base of the plant.

Extensive infestations can be reduced in density using Starane Advanced as a foliar spray used at 3 mL/1 L of water.

Herbicides for control of docks

Product#Method of applicationRate*State
Starane®Advanced Herbicide Foliar spray 300 mL/100 L of water All
Grazon® Extra Herbicide Foliar spray 350 or 500 mL/100 L of water All
Tordon®75-D Herbicide Foliar spray 75 or 150 mL/100 mL of water NSW, Old, SA, Vic, WA
Trezac® Arylex® active Herbicide Foliar spray 200 mL + 300 mL Starane® Advanced/100 L of water All
Colex-D® Herbicide Foliar spray 190 mL/150 L of water All
Grazon® Extra Herbicide Controlled droplet application Apply undiluted All

# Note: Preferred product option in bold.  * Consult label for details of growth stage and use, especially where range of rates is given.

Treatment timing

Timing for docks treatment

The optimal time to spray docks is before the flowering stem develops. This will minimise the herbicide required and prevent seeding.

Starane® Advanced Herbicide
Grazon® Extra Herbicide
Key: Best time to spray/treat Can spray/treat if conditions are suitable Do not spray/treat