Description
What is Grazon Extra used for?
Grazon Extra is a herbicide used to eradicate hard-to-kill weeds in agricultural and non-crop settings. It’s particularly effective against noxious woody and broadleaf weeds.
What sets Grazon apart from other weed killers is its unique combination of actives, which provide knockdown control and have a residual effect in the soil that can last up to two years.
Does Grazon Extra kill grass?
When applied as directed, Grazon Extra Herbicide does not kill grass, which means it’s perfect for use in pastures where desired grasses must be maintained. You can use a herbicide like Grazon to eradicate weeds from these areas without any damage to the pastures themselves.
What are the major weeds controlled by Grazon Extra Herbicide?
The main weeds controlled by Grazon Extra include common species of environmental, noxious woody and herbaceous weeds found in Australia, including blackberry, thistle, gorse, lantana, and St John’s wort.
Here’s a comprehensive list of plants this herbicide can be used to kill:
| African boxthorn | Horehound |
| Angophora spp. | Lantana (Lantana camara) (Lantana montevidensis) |
| Australian blackthorn | Lion’s tail (Leonatis nepetifolia) |
| Banksia spp. | Limebush |
| Biddy bush | Manuka |
| Blackberry | Mesquite (Prosopis spp.) |
| Blue heliotrope | Prosopis velutina |
| Brooms (Cape, English, flax leaf, montpellier) | Milfoil (Yarrow) |
| Camphor Laurel | Mistflower |
| Capeweed | Mother-of-millions |
| Casuarina spp. | Paddy’s lucerne |
| Chinee apple | Parkinsonia |
| Cockspur thorn | Paterson’s curse |
| Common sensitive plant | Prickly pear (common) Smooth tree pear |
| Crofton weed | Rubber vine |
| Eastern cotton bush (Maireana microphylla) | Siam weed |
| Eucalyptus spp. | Sicklepod |
| Fireweed | Spear thistle |
| Galenia | St John’s wort |
| Giant bramble | Sweetbriar |
| Gorse | Tobacco weed |
| Groundsel bush (Baccharis halimifolia) | Wattle (Acacia spp.) (except corkwood wattle) |
| Green cestrum | Wild Rosemary (Cassinia laevis) |
| Hawthorn | Wild tobacco tree |
How long does Grazon Extra remain active in the soil?
Grazon Extra has fantastic residual results, staying active in the soil up to two years after initial application. This makes life easy for land owners and managers, as frequent reapplication is not required to keep weeds under control.
What is the grazing withholding period after applying Grazon Extra?
When Grazon Herbicide is used as directed, there is no grazing withholding period required to comply with Australian regulations. If your stock is destined for the domestic market, it can continue to graze on pastures treated with Grazon. However, please note that different intervals will apply for export markets, depending on the destination country.




Kamall Iwanovski
This is the best product I have ever used.wont use any other products again.
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Simon Heritage (verified owner)
Grazon Extra is an excellent selective herbicide. It is very expensive, but it does what it says it does! Excellent product. I left one star off as the delivery and service of Specialist Sales was less than its normal exemplary standard.
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Janine Teitge
Hi Simon, thankyou for your review, and we once again do apologise that we didn’t keep up our usual standard this time. Thankyou for keeping in touch with us throughout the delivery process and you can rest assured that we’ve instilled our customer service approach to our team and we hope to be able to showcase that with your next order.
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PJ (verified owner)
Awesome outcome don’t waste time and money on anything else
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Paul McMillan (verified owner)
For killing blackberry Grazon Extra is the only product worth using. Shows results in a week and very effective in terms of minimal regrowth.
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Zoe (verified owner)
Grazing extra is very effective for all broadleaf weeks in horse paddocks. Quick acting and allows grass to grow through. Highly recommend
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Maria (verified owner)
This product works extremely well on St John’s Wort . Instructions are clear and delivery was fast.
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Mark Schlink (verified owner)
Great results ,mixed with Roundup on blackberries , got a result in 72 hrs, leaves wilted, 7 days, noticeable brown off.
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Jason davies
Worked well on Cape Weed, even on dense patches, it took a bit longer to die (1 or 2 weeks) but stopped new growth and flowering immediately. Have also used on other weeds with good effect. Will kill some grasses but will leave other grass types alone.
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Michelle (verified owner)
We have been using grazon for quite a few years now. Can’t believe the difference in our 2.5 acres. The weeds are almost non existent and the grass grows beautifully each winter. Will not use anything else where there is grass now. Specialist sales very easy to order from, no hassles with delivery or product.
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Rob (verified owner)
It kills all the woody pests but leaves the grass alone.When I want to kill everything I add roundup equivalent to it and everything is killed.It does not effect trees.
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Susan (verified owner)
Quick postage
Works very well very pleased with the product.
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Simon (verified owner)
Been very happy with this. Finally a product that will reliably kill all the hard to kills.
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Anthony Kain (verified owner)
I found this product excellent. Worked very well for me in my quest to irradiate wild blackberry which was taking over. Very eff
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Mal (verified owner)
Target aim to knock off Blackberry amongst native vegetation. So far excellent results found. Grazon Extra is working a treat.
Purchased from Specialist Sales, a perfect Australian company to deal with. Very easy transaction, product packaging was perfect and speedy delivery. Thank You Specialist Sales.
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Paul Abrey (verified owner)
Easy to use and incredibly effective, trouble free ordering and delivery from Specialist Sales. Very happy!
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michael overington (verified owner)
this product is first class to remove gorse from paddocks that i graze
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Chris (verified owner)
Too early to tell yet as gorse is very, very stubborn but fingers crossed we get a good kill.
Specialist Sales provided prompt delivery and product arrived in perfect condition.
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Raymond Fuller (verified owner)
I use this product frequently and usually buy local, but I couldn’t get 5 litre containers of it so I went online and found SpecialistSales who do, and also offer free delivery, excellent service all at a very competitive price. The transaction went flawlessly and the order was delivered rather quickly. Would definitely use this company if I need more of similar products.
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Lana (verified owner)
Great product, find it excellent on cape weed, Bindi and all broad leaf weeds, I like the 1ltr ideal for my small garden.
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Nigel Ayres (verified owner)
Used in a small towable boom sprayer does a brilliant job of removing multiple weeds including thistles etc. you can really see the difference between sprayed and not sprayed areas within a few days.
Also like the fact it is not affected by rain after 1 hour.
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John Morgan (verified owner)
Very effective on a variety of weeds.
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Natasha (verified owner)
Great service from the team, answered my phone calls, helped with questions, product delivered quickly
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Angelina
This is the best product we have found for controlling wandering jew – native and exotic one. It also works well on other common weeds we have on the property in the grass. Excellent delivery times and great price
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Ross (verified owner)
Great product. Knocks the crapp out of lantana which is why i purchased it. Not expensive for what it does and other weeds that it controls. Suits my purpose for control of the lantana and other noxious weeds.
Also great customer service. Product arrive well before expected. A top company to deal with. Questions asked about products, always answered, and with advice.
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Bev Tucker
Order received within 4 working days of order- thank you.
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Liz Day (verified owner)
It is really struggling to eliminate horehound. Plants about 10 cm high, seems to have hit them a little after 4 weeks. Will re apply.,
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specialistsales
Hi Liz. Please ensure you are applying Grazon Extra to Horehound pre-flowering and that the plants are being covered thoroughly.
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andrew-5071 (verified owner)
Yes, prompt delivery and does exactly what it says it will do. We have a vast weed issue across a large paddock area and was looking for the right solution to the issue and believe it has been found.
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Mick Clarke (verified owner)
Great Service, good information, highly recommended
very effective product
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Ranid May (verified owner)
Awesome product which is very effective and easy to use and good value
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Rob (verified owner)
Very effective herbicide. Easy to use
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Ian ‘David’ Blake (verified owner)
This is the Rolls Royce for woody weeds in the tropics, especially lantana
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Bibi Liati (verified owner)
Exactly as I expected
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Heidi
This product significantly reduced the amount of Patterson’s Curse, Capeweed and other woody weeds from cropping up from last season when I sprayed with Grazon Extra. So much so in fact that I was able to spot spray this season the little amount of weeds that popped up, with the backpack rather than using the boom on 12 acres. Thoroughly recommend this product if you have horses and have to deal with Patterson’s Curse, Capeweed and other woody weeds.
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