Dock
Dock (Rumex obtusifolius) is a relatively common tap-rooted weed that in found throughout New Zealand, however because of its size it
Problem Overview
Dock (Rumex obtusifolius) is a relatively common tap-rooted weed that in found throughout New Zealand, however because of its size it is not common on lawns. Closely related species such as fiddle dock (Rumex pulcher) and sheep’s sorrel (Rumex acetosella) are likely to be more common in lawns. It has very large (up to 250mm long) wide, erect, round tipped leaved that are bright green in colouration.
Solutions
All turf types: Dock is controlled using a selective herbicide such as 2,4D & Dicamba (Banvine) applied at label rates. It is preferable to apply these products from September until May when the plants are actively growing.
Fine turf species will also be affected if these products are applied to lawns that are suffering from heat stress or moisture stress. In these circumstances it is advisable to apply fertilizer and irrigate for 7 - 10 days prior to application to ensure that the lawn is in a healthy state prior to spraying.
Other Similar Lawn Problems

Poa annua
Poa annua is an annual grass weed from the large Poa family that tends to act as an annual grass

Creeping Oxalis
Creeping oxalis (Oxalis exilis) is a member of the Oxalidaceae that is a native of New Zealand.

Paspalum
Paspalum (Paspalum dilatatum) is a perennial grass weed that causes problems on lawns throughout the North Island of New Zealand.
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