Product Information


How do Contact Organics weed control products kill weeds? 

Contact Organics products kill weeds in a similar way to a heavy frost or extreme heat wave. They quickly break down the cells of the plant by degrading the protective film of sprayed plant areas to cause complete dehydration.

While one active ingredient works on dissolving the waxy layer of the plant leaf, another, volatile ingredient draws moisture from the plant into the air.

The formulation is a highly effective desiccant, not a systemic poison, so plants are unable to build immunity.

How does it work?

Our Weed Terminator’s are natural herbicides designed for agriculture, government, municipalities, the education sector, revegetation programs, national parks as well as small and large homes.

When combining the active ingredient of acetic acid and Contact Organics proprietary delivery technology we penetrate the plant by breaking down the waxy covering (protective film) of the weed. This allows the moisture to escape and effectively desiccating the weed by dehydration to termination. With no residues remaining in the soil, weeds are unable to build resistance.

Being made from natural ingredients, means there are no toxins or poisons that can pass into the food chain or the human body.

Our Safe Series Soil Conditioner has been designed to be applied in conjunction with the Weed Terminator. It conditions the soil and enhances water uptake and distribution. In addition, it feeds micro nutrients and iodine to your soil to promote healthy growth and microbial activity.

Can I purchase it from you direct or can it be done online?

Yes, we offer an online store which sells our HomeSafe range of products. We also have a number of distributors throughout Australia that can supply you with the all our products.  Commercial sizes of 15lt and 1000lt are only sold through our distributors and their networks.

Our website will be able to guide you to the distributor in your region.

If you would like to purchase some of our Weed Terminator but are struggling to find someone to buy it through, please let us know and we will work with you to getting product to your door.



Is the FarmSafe weed killer effective against false dandelion and capeweed?

Yes, our product is very effective against false dandelion and capeweed, matter of fact it is very effective against most common weed types.


What Weeds does your product control?

When you spray the Weed Terminator, you will see results in 2 hours, 3 days or 1 week, this will depend on type of weed, climate and dilution. Some of the woody weeds and those with massive tap roots will require a re-spray.

This spray will kill all your normal pathway weeds including Fleabane, Fire weed, milk thistle, Thistle, Small Oxalis, Clover, Richardia, Bindii, Flat weed, Various creeping weeds, Winter grass, Summer grass, Calthrop, Paspalum grass, Couch grass and general everyday weeds.

When spraying over grass in poor condition use 1-30 mix.  As the spray contains fertilizer the grass I have couch grass continually growing through my garden driving me nuts. Is it safe to use under trees and will it affect other plants? Does it have to be mixed?

Our weed killer does affect all plants it comes into contact with. However, if it is a little spray drift the impact will be barely noticeable maybe a couple of brown spots.  HomeSafe is effective against couch when wanting to stunt its growth, unfortunately the large root system of couch will nearly always result in some re-growth.  If spraying it on a path it will brown it off for a number of weeks. When you see it starting to grow back spray it again. After some repeated applications the root system will give up and go in another direction.

Be sure to test a small area first.

Any re-growth can be taken out by spraying around the base of the weed into the root system. If you Overspray you will only brown of a bit you mistakenly hit

Plants will not become resistant and the spray is not residual after 14 days

Killing the seeds and Flower heads is possible with actively growing plants due to the desiccation nature of our Weed Terminator.

Control of tougher weeds is completely possible, refer to label for heavier rates.

Large bushes, such as Pampas Grass may require a slightly less diluted mix once you have desiccated the seeds, cut it down low, spray the remaining clump. This is a tough gnarly root to kill. Check and re-spray until dead. Various wild grasses like Lomandra’s, love grass, serrated tussock, kikuyu and others spray the seeds soak the centre.


Use a stronger mix on tougher weeds like Crofton, varieties of Calthrop, Patterson’s curse, Farmers Friend, African Burs, Stink weed, Nettle, Penny wart and Giant Parramatta grass, round up resistant weed., Nut grass is best to spray in flower.


Weed runners like Turkey Rhubarb and Fleshy madeira vine with tubers, spray to defoliate. The re-growth will tell you where the tuber is. Spike down the centre of its base add some mix down the hole.  Onion weed in lawns and gardens rip off the head and spray down the centre of its base. Oxalis spray the foliage and soak the base. Re-spray any regrowth, the mix will get deeper as the ground will be more permeable due to the action of the soil conditioner.  Wandering Dew, rake it, bin it, then spray with a stronger mix to kill off the runners you will need to pick out all the bits that hide under roots and rocks then re-spray and make sure you re- check. Or it will come back.

Healthy Buffalo grass - mow low first and spray it twice.

Grass borders - spray back to 150mm soak, and spray twice.


Woody weeds like Bitou Bush, Blackberry, Juvenile Privet, Lantana and Camphor Laurel

Spray to kill seeds and buds.  Cut it down, scrape some bark off the root or stem to the cambion layer and spray that. Come back and spray and soak any re-growth.

If you can’t cut it down, spray when it is flowering.  Knock out all the flowers and buds.  The weed will go into shock and will become dormant. Spike around the root base and scrape to the Cambion layer and spray.

Follow up the kill with our spray to knock out the re-growth and kill the seeds, the mix will re-condition the soil of most toxins. You may need to repeat a few times, but you will get control.

Once you get control dilute the mix to the lower maintenance levels,


Nothing within the SDS says that it is safe for farm animals and bees etc. if they digest any. 

On the products page you can download the relevant SDS sheet. Referring to page 4 of the “Contact Organics LocalSafe Weed Terminator RTU Spray Mixture SDS” the top of the page has the Toxicological Information.

Under Toxicity Data it states that consuming greater than 20,000 mg/kg it would kill 50% of rats.  Translated - a rat would have to consume 20L of the spray mixture per kg or part thereof, of its weight to kill it.  So, a goat or a sheep would have to consume a far greater amount, which I would suggest would not be possible.


If I spray within 1 meter of the creek will the acidity affect the fish and caters in the creek?

Our product is completely fine to do spot spraying 1m from a creek, it would only be detrimental if large volumes of the spray mixture was going into the creek itself.  I believe this could not be the case when being applied by hand.

The below excerpt is taken from page 4 of the SDS.


Ecotoxicity This product may cause short term harm to the aquatic environment due to its acidity.

Persistence and Degradability:
Acetic acid is degraded by sunlight and rapidly biodegrades in soil and water. Inorganic constituents are not biodegradable.


Do you have an organically certified herbicide?

At this stage, our Weed Terminator product has not been certified as input for organic production. The key reason is that our Weed Terminator includes chemically made vinegar of higher concentration to meet our high-performance requirements. And the current organic certification scheme does not certify products that include chemically made vinegar.

While we have patents on organically certifiable herbicides, we focus our business on offering the market a non-toxic, high performance and cost effective herbicide. Our Weed Terminator has been formulated from natural ingredients and is non-toxic when it is being applied in a weed spray application.


Do you have a product that is effective on aggressive woody weeds like lantana?

Best way we have found to beat lantana is to use a mulcher slasher like the INO mulcher then when any young shoots sprout you can spray them with LocalSafe.

You must saturate all leaves with this product for it to be effective. Reducing the volume of leaf also make the process more economical for you.


Do you have anything to control mother of millions or ochna?

Mother-of-millions - Bryophyllum delagoense is a hardy succulent that would need to be sprayed with a strong mix rate of perhaps 1:10. I would also cut the plant down and spray new growth for a better economic outcome for you. Ochna has over 80 species, but the most common in your area has a solid firm bark. Once again, repeat the process above and also scrape back the bark on the trunk to expose around 100 to 200mm, what is called the cambium layer. This is a thin green layer under the bark, spray that exposed area at the same time. We have had success with this method on plants such as black berry and other bramble types.



What kind of uses is your non-glyphosate weedkiller approved for, and in which countries?

Contact Organics has developed non-toxic Weed Terminator products from natural ingredients for three key market segments.
HomeSafe Weed Terminator for use around homes and gardens
LocalSafe Weed Terminator for use in public amenities, Councils, schools, parks, playgrounds and verges
FarmSafe Weed Terminator for horticultural, orchard and vineyard applications
Our products have been approved for use in Australia and USA. New Zealand and Europe regulatory submissions are currently being worked on.

Your weedkiller is based on acetic acid. Isn’t that vinegar? Why don’t people just go out and spray vinegar instead?

Over many years, environmentally aware gardeners have used vinegar as a basic herbicide. There are many recipes published on the internet that are based on a combination of vinegar, salt and dish washing liquid. If you prepare such a product and spray weeds with it, the initial result looks promising, but it is not really convincing as weeds regrow quickly and hardier weeds are not touched at all.

This is where our product development started and our technology comes into play. Contact Organics’ history is in health science and medical supplement development. We are specialists in making active ingredients bio-available through cutting edge technology and delivery systems.

We have applied our delivery technology to acetic acid and created our safe range of Weed Terminators that are non-toxic, fast acting, high performance herbicides.

Much of the concern over the health and environmental effects of glyphosate based weedkillers focuses not on the effects of glyphosate alone but on the effects of the adjuvants, both alone and in combination with glyphosate. You must include adjuvants in your product in order to enable the active ingredient, acetic acid, to be absorbed into the plants effectively. What these adjuvants are is presumably not disclosed, due to commercial confidentiality. How do you know that they are safe, both individually and in combination with the active ingredient?

Contact Organics products are based on Acetic Acid and adjuvants that are all well-known and occur in nature and are on the USA EPA Inerts Products List.

Europe’s TSG Consulting and Chemwatch have conducted independent reviews of Contact Organics raw materials and product compositions and issued their toxicity and eco-toxicity reports, and Safety Data Sheets. These reviews confirm that our products are non-toxic and non-hazardous to the environment at the dilution levels used.

USA EPA also conducted a thorough review of Contact Organics Weed Terminator product and composition. They confirmed our product as a bio-herbicide and is currently progressing with its regulatory approval process. We expect our first HomeSafe, LocalSafe, FarmSafe Weed Terminator approval in USA by April 2019.

Has your product had to go through the usual animal toxicity testing that the usual pesticide active ingredients have to go through? (just for your info, we are not against animal testing of pesticides—much as we don’t like experimentation on animals, the alternative at the moment is releasing pesticidal products into the market essentially untested for their biological effects and thus potentially harming millions of animals and people)

USA EPA also conducted a thorough review of Contact Organics Weed Terminator product and composition. They confirmed our product as a bio-herbicide and is currently progressing with its regulatory approval process. We expect our first HomeSafe, LocalSafe, FarmSafe Weed Terminator approval in USA by April 2019.

Contact Organics Weed Terminator contains Acetic Acid as active constituent.  The main health hazards of the product arise from the acidity of the product.  The product is of low acute toxicity.

Acetic Acid is very well understood as an active constituent and there is an abundance of data documenting its toxicity and eco-toxicity. Refer to the 2015 report by European Food Safety Authority

Based on this large amount of information available, Contact Organics Weed Terminator has been so far not required to conduct animal studies.

All our other ingredients are on the USA EPA Inerts Product List and are naturally occurring materials. They are well understood and judged as non-toxic or as materials of low toxicity.

Spraying acetic acid on plants is likely not only to kill weeds but also to harm various sorts of wildlife, such as beneficial soil organisms, toads, and insects. So, in what way is it safer than glyphosate based weedkiller?

The main benefit of the use of Contact Organics Weed Terminator is the low environmental impact of this product.  The active ingredient, Acetic Acid, is generally regarded as safe, readily biodegradable and leaves no toxic residue.  This product provides a safer alternative to toxic synthetic pesticide-based herbicides.

A leading research institute in USA is currently conducting a 2 year comparative study of the impact of Contact Organics Weed Terminator and Glyphosate on soil microbiology. The study has progressed to the second year. We expect that the institute will issue a progress report in a short period of time.

The research to date confirmed that Organics Weed Terminator does not damage soil microbiology

One of the most damaging organisms is a fungus known as fusarium. The research laboratory evaluations confirmed that in comparison to glyphosate which caused a dramatic increase of the fusarium Weed Terminator had a dramatic effect on fusarium to the point of almost elimination. Fusarium can contribute significantly to the loss of propagation material.

A most important bacteria known as the Pseudomonas Fluorescens had multiplied dramatically. This particular organism is responsible for the creation of root nodules. Root nodules in turn are responsible for collecting nitrogen from the soil and atmosphere and making it bio-available to the plant.

We are looking forward to the finalisation of this important study as it will provide an independent assessment of Weed Terminator and its benefits to the soil microbiology and agriculture.


I need to get rid of grassy weeds (Buffalo or Kikuyu) along a pathway, and in an area I want to eventually plant as garden. What is your best product for this and where do I purchase?

Buffalo and Kikuyu are difficult to control because of their monstrous root system, With LocalSafe you will be able to control their growth onto garden paths, driveways etc. The advantage to using LocalSafe is that when you spray along the pathway it will only control what you have sprayed, and you will not get runners that die off in the lawn itself. Spraying in a garden bed will likely require a few cycles but persistence pays off.


What is the difference between LocalSafe and FarmSafe?

LocalSafe Weed Terminator plus LocalSafe Soil Conditioner

LocalSafe is sold in modules of
1 x 15lt LocalSafe Weed Terminator
1 x 5lt LocalSafe Weed Terminator


1 x 5lt LocalSafe Soil Conditioner
1 x 5lt LocalSafe Soil Conditioner

Mixed at a ratio of 1:1:20

One 15lt module gives you between 300-450 litres of spray mixture
One 5lt module gives you between 100-150 litres of spray mixture

Strong, fast impact, limited regrowth

Weed Terminator - Active Ingredient Acetic Acid desiccates weed. Further adjuvants enhancing AA performance. Better delivery into weed.

Soil Conditioner - enhances condition of soil through delivery of wetting agent, de-clogging agent, micronutrients at ppm level that feeds microbiome in soil. Healthier soil microbiology reduces weed growth.

FarmSafe Weed Terminator plus FarmSafe Soil Conditioner

FarmSafe is in a modules of
1 x 1000lt FarmSafe Weed Terminator
1 x 500lt FarmSafe Soil Conditioner

Mixed at a ratio of 1: 0.5: 20

One module gives you between 20,000-30,000 litres of spray mixture

Strong, fast impact, limited regrowth

Weed Terminator - Active Ingredient Acetic Acid desiccates weed. Further adjuvants enhancing AA performance. Better delivery into weed.

Soil Conditioner - enhances condition of soil through delivery of wetting agent and de-clogging agent. Healthier soil reduces weed growth.

The FarmSafe Soil Conditioner formulation is slightly different it has a lower level of nutrients in it. We proceeded this way in the interest of making it more affordable for large scale agriculture.

Whilst spraying weeds at tree bases, can the odour affect plant health and if there is drift onto the trunk/bark of the young tree, will that affect plant health?

Weed Terminator is a contact herbicide with Acetic Acid as active ingredient. Acetic Acid is in the form of vinegar a naturally occurring product.  The vinegar smell is detectable when freshly sprayed but will dissipate over a short period of time.

Weed Terminator spray mixture at a 1:1:20 dilution rate will kill weeds and grasses that have been directly sprayed.  Trunk/bark of young tree will not be affected as it is much hardier. If tree leaves are sprayed on, there might be a small level of browning noticeable, but the tree health will not be affected by Weed Terminator spray mixture. Acetic Acid will biodegrade over a 2-4 weeks period and will not leave any residue in the area.

Can the product mix burn surface roots of young plants?

The potency of Weed Terminator product depends on its dilution level.  Weed Terminator in fully concentrated form would burn surface roots of young plants. However, at a 1:1:20 dilution level, it will not harm surface roots of young plants when sprayed on weeds in the surrounding area.

Will the product mix kill aquatic life if sprayed/contact?

Weed Terminator product is based on Acetic Acid and therefore has a low pH.  Contact Organics advises not to spray the product directly on waterways.  However, as it is being used for weed control through spot spraying and its active ingredient, Acetic Acid, will biodegrade over a shorter period of time, there will not be a large enough inventory of the product in the system to have any impact on aquatic life.

If mixed at 50ml/50ml/1000ml and contact/drift is made with human skin what is the consequence?

Please consult Weed Terminator spray mixture SDS before spraying. Weed Terminator spray mixture is a non-hazardous product. It contains acetic acid as active ingredient at 50% level of a normal pickling vinegar.  However, as it has a lower pH it can cause irritations of the eyes and skin if directly sprayed on or through spray drift.  Please wear recommended personal protective equipment and wash your hands after use.  Details are included in SDS.

Still Have Questions?

If you have any other question we haven’t answered here, give us a call on 1300 856 540 and we’ll help you out.