How to kill Blackberry

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

Blackberry Description

Blackberry Identification

  • Blackberries commonly form dense thickets that may grow more than 2 m tall and cover large areas.
  • The plant has prickly stems or canes that grow from a perennial crown up to 150 mm in diameter.
  • The canes may be erect, arching or trailing and can reach 6 m in length.
  • Leaves consist of three to five separate leaflets, are dark green on the upper side, whitish underneath, and usually bear hooked thorns on the leaf stalks.
  • Partially deciduous it sheds leaves in winter.
  • Flowers are 2–3 cm in diameter, white or pink in colour and are formed in clusters at the ends of the branches.
  • Fruit change colour from green to red to black, each containing one seed.

Blackberry Control

How to kill Blackberry

Blackberry is a weed of national significance and is identified as being invasive, having the potential for widespread environmental, social and economical damage. Landowner’s and land managers at all levels are responsible for actively managing this weed.

The best time to treat for control of blackberry is from January through to March, although if conditions allow treatment can be as early as November and December, or as late as April and May.

Recommended treatment is with GrazonTM Extra Herbicide using a foliar spray application at a rate of 350 or 500 mL/100 L of water. This method can used in any Australian state or territory.

Herbicides for killing Blackberry

Method of application Rate* State
Grazon™ Extra Herbicide Foliar spray 350 or 500 mL/100 L of water All
Garlon™ 600 Herbicide Foliar spray 170 mL/100 L of water All
Stinger™ Herbicide Foliar spray 20 g/100 L of water + Uptake™ All
Stinger + Glyphosate 450 Foliar spray 20 g + 160 mL/100 L of water + Uptake All
Tordon™ 75-D Herbicide Foliar spray 1300 mL/100 L of water Vic
Tordon™ RegrowthMaster Foliar spray 500 mL /100 L of water + adjuvant All exept NT
Grazon Extra Aerial spray 10 L/ha (apply in 200 L water/ha) ACT, NSW, NT, Qld, SA, Vic, WA
Garlon 600 Aerial (helicopter only) 4.8 L/ha (apply in 200L water/ha) NSW, SA, Tas, Vic, WA
Stinger Aerial (helicopter only) 320 g/ha NSW, Tas, Vic only
Garlon 600 Aerial (helicopter ot fixed) 4.8 L/ha (apply in 200L water/ha) Qld
Garlon 600 Controlled droplet application 170 mL/1 L of water All
Grazon Extra Controlled droplet application Apply undiluted All
Tordon™ Granules Granule application - Hand 35 - 45 g/m2 Vic, Qld, NSW, SA, WA
Garlon 600 Gas gun application 280 mL/10 L of water All
Grazon Extra Gas gun application 335 mL/10 L of water All
Stinger Gas gun application 20 g/10 L + Pulse™ All
Vigilant™ II Herbicide Cut stump Apply neat: 3–5 mm layer All

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

Treatment Timing

Timing to kill Blackberry

PRODUCT Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug
Grazon Extra
Best time to spray/treat
Can spray/treat
if conditions are suitable
Do not spray/treat