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Weed profile

Dock – Broadleaf

Rumex obtusifolius

Also called Broadleaf Dock

Type
AGAgricultural weed
Dock – Broadleaf growing Dock – Broadleaf, close up
Photos from SGLN’s 2017 weed guide

About Dock – Broadleaf

Docks are often indicative of moist to wet ground with poor drainage and at least intermittent waterlogging. Freshwater swamps and marshes are common habitats. However the exotic species, in particular, will grow readily in seasonally wet depressions, waste lands, roadsides and cultivated ground. None of the species are, if ever, associated with saline environments.

There are about 10 species of Dock found in Victoria. Most species are common and widespread. Native species include Slender Dock (Rumex brownii), Wiry Dock (R. dumosus), Mud Dock (R. bidens) and Glistening Dock (R. crystallinus). Exotic species include Curled Dock (R. crispus), Clustered Dock (R. conglomeratus), Fiddle Dock (R. pulcher) and Broad-leaf Dock (R. obtusifolius).

Manual control

Docks are perennials, they develop a deep tap root. Hoeing or cultivation not recommended as the plant will regrow from the root crown or from pieces of root if not completely removed. Renovating the paddock to improve drainage and soil compaction, and establishing healthy perennial pasture can help control.

From SGLN’s 2017 weed guide.

Herbicides must be applied at the appropriate rate as specified on the label and all safety precautions followed. If chemical control is necessary near drainage lines or streams, use extreme caution as the effects on aquatic life can be devastating even in minute amounts. Always seek expert advice.
Chemical control notes from SGLN’s 2017 weed guide

Spray plants at the early rosette stage in early winter. A flowering stem emerges during spring and the seed matures through summer. The stems usually die back during autumn and the plants over-winter as rosettes. Chemicals: Tigrex selective herbicide or glyphosate are registered for use in Victoria. Always check the herbicide label before use.

These notes are from 2017, and some information, particularly herbicide information, may be out of date. Please ask local suppliers and do your own research in selecting herbicides if choosing chemical control.