Garden Nursery Products
Gold Coast · Est. 1979

Grazon Extra Herbicide 20L

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Pro-Grade Quality
24hr Dispatch
FARM CHEMICALS · SKU: 038-073

Grazon Extra Herbicide 20L

★★★★★4.7 (55 Google reviews)·Available — In-Store Pickup Only

$720.50 Inc GST

Grazon Extra (Corteva): 300 g/L triclopyr, 100 g/L picloram and 8 g/L aminopyralid, for the weeds named on the label in agricultural non-crop areas, commercial and industrial areas, forests and pastures. Damaging to susceptible plants: read the label before use. Available in 1L, 5L and 20L.

Only 1 left in stock

Fast DispatchWithin 24hrs Australia-wide
Quality GuaranteedPro-grade formulations
25 kg43 × 29 × 22 cm
Need Advice?07 5537 4585
Active Ingredient300 g/L Triclopyr, 100 g/L Picloram, 8 g/L Aminopyralid

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Product Description

Grazon Extra Herbicide is a Corteva herbicide containing 300 g/L triclopyr (as butoxyethyl ester), 100 g/L picloram and 8 g/L aminopyralid (both as hexyloxypropylamine salt). It comes in 1L, 5L and 20L containers.

The label lists Grazon Extra for the weeds named on it (for example blackberry) in agricultural non-crop areas, commercial and industrial areas, forests, pastures and rights-of-way, and in fallow. Home gardens and lawns are not among the sites listed on the label.

Read the label before use. Grazon Extra is damaging to susceptible plants, including vegetables, fruit trees, flowers, ornamentals and shade trees, during both growing and dormant periods. Picloram and aminopyralid can stay active in the soil for extended periods. Do not apply where spray drift or treated soil could reach desirable plants, or close to their roots, and do not move treated soil to areas where plants are to be grown.

Rates depend on the weed. See the Application Rates tab and our herbicide mixing rates guide for label rates, and follow the label for protective clothing.

Additional information

Weight25 kg
Dimensions43 × 29 × 22 cm
Size

20L

Safety Data Sheets (SDS)

Application Rates

Application Rate:
Rates depend on the weed. For blackberry the label gives 350 mL or 500 mL per 100 litres of water (use the higher rate on difficult or damaged plants). Other weeds range from 150 mL upwards per 100 litres. See our mixing rates guide for the label rates for common weeds, and always check the label for your weed.

 

How to Apply:

Spray Coverage: Spray leaves and stems thoroughly until wet, just before the mixture starts dripping. Aim for full coverage, like painting a wall, ensuring even the inner parts of dense weeds are sprayed.

Equipment: Use a spray unit suited to the weed. Corteva only recommends knapsacks or 12 volt sprayers for low-growing weeds and for woody weeds that are not regrowth and are under 60 cm. For larger bushes, use a high volume sprayer or handgun.
Effectiveness: Proper coverage ensures the chemical kills both the weed’s top growth and roots. For larger weeds like mature blackberries, ensure all canes, inside and out, are sprayed.

 

Spray Volume Guide:

For blackberries (1–2 m tall): Use 3000–4000 litres per hectare.

 

Important Notes:

Always read the label for specific instructions, rates, and safety information before use.
Follow all safety, storage, and disposal guidelines provided on the product label.

Tips for use

Equipment Needed
For large infestations (e.g., dense blackberry stands): Use a large motorized pump with a spray gun. You can hire this equipment or engage a professional applicator.

For smaller areas: A knapsack or hand pump spray unit works fine if you achieve good coverage (spray to the point of run-off).
Use a spray unit exclusively for herbicides to avoid contamination.

Additional tools: measuring jug, protective clothing (long sleeves, pants, gloves, hat), safety glasses, or a face shield.

 

Mixing Instructions
Use clean water (e.g., town supply or rainwater tank) for mixing. Avoid hard or alkaline water to maintain effectiveness.
Fill the spray tank halfway with water.
Add Grazon Extra, then fill the rest of the tank with water.
If needed, mix in a spray oil or wetting agent after the tank is full.
Keep the solution agitated and use immediately. If stored, agitate daily and use within 7 days.

 

When to Spray
Target young, actively growing weeds for the best results.
Apply when weeds are not stressed (e.g., from drought, heat, or pest damage).
Avoid spraying if rain is expected within an hour or if leaves are wet.
Do not disturb treated weeds for six months (e.g., by cutting or burning) to ensure the chemical fully takes effect.

 

First Aid
If poisoning occurs, call a doctor or the Poisons Information Centre at 131 126.
Refer to the Safety Data Sheet (SDS) for more details.

Active Ingredients

300 g/L TRICLOPYR present as butoxyethyl ester 100 g/L PICLORAM present as hexyloxypropylamine salt 8 g/L AMINOPYRALID present as hexyloxypropylamine salt

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Frequently asked questions

What is the difference between a selective and a non-selective herbicide?

A selective herbicide kills target weeds while leaving desirable plants unharmed - for example, a lawn-safe product that removes bindii and clover from buffalo or couch without damaging the turf. A non-selective herbicide such as glyphosate kills almost any green plant it contacts, so it is used for driveways, fence lines, garden-bed prep and total vegetation control, never on lawns.

What is a pre-emergent herbicide and when do I apply it?

A pre-emergent creates a barrier in the top layer of soil that stops weed seeds from establishing as they germinate. It does not control weeds that are already growing. Apply it before the target weed germinates - late summer to early autumn for winter grass, and early spring for summer grasses like crabgrass and crowsfoot - then water it in.

Will herbicide damage my lawn?

Only if you use the wrong type. Non-selective herbicides (glyphosate) will kill or badly damage turf. Selective lawn herbicides are formulated to be safe on common Australian turf at label rates, but tolerance varies by grass - buffalo is the most sensitive - so always check the label lists your turf type before spraying.

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