Organic Crop Protectants Slasher Organic Weedkiller

I don't know what they have done to the product but it doesn't seem to have any affect whatsoever on the weeds. Used last year and was brilliant but nothing now even after 2 sprays. Show details

DOESN'T WORK – Honestly don't waste your money on this CON, IT DOESN'T WORK. I was a Grounds Supervisor before I retired and we trialled this garbage, IT DOESN'T KILL WEEDS!

Unfortunately wasn’t good – We brought the premix this time. 3 litre ready to use. I am really annoyed as I know this is an excellent product, but premix didn’t work. Nothing has died a week later. Normally we get concentrate, the weeds die within minutes. And it’s fabulous. My advice is to buy concentrate to mix yourself. We’ve wasted money once and won’t do it again. Show details

Waste of time and money! – Totally useless product! May as well spray the weeds with hot water. All it does is blacken a few leaves on some weeds and no effect at all on others. I am a qualified horticulturist so I know what I am doing. Just go buy a bottle of turps or vinegar and you will get a better result for a cheap price. Show details

Public space experience with Slasher – I have been using Slasher for a few months now at my job in a large public park. I find it extremely useful for vegetation control in public spaces. It does have a smell which I don't find unpleasant & I find that's a useful reminder for when I use Glyphosate that doesn't smell but which would be inhaled just the same. As an example of the… Read more ·  1

usefulness of Slasher I've found it is especially effective at knocking back rapidly growing plants such as Madeira Vine & Turkey Rhubarb. The plants themselves will invariably regenerate from their tubers but these can then be effectively treated with glyphosate products at a much lower volume and much more safely than what would otherwise have been the case. As another example I used Slasher on a large area of "out of control" mature Bidens pillosa (Farmers Friend) which effectively defoliated it. A week afterwards it was looking brown & crisp so we physically slashed it back knocking all the seeds to the ground where they will germinate. The seedlings are then very effectively treated with Slasher. If I had used a Glyphosate product I would have been much less comfortable about using it in that public space, both for my own sake and the park users, and the plants would not have dried off anywhere near as quickly. On the other hand, the Kikuyu at the same location will initially at least be treated with a Glyphosate product as I want the rhizomes / runners affected not just the foliage and only a systemic product will do that whereas multiple applications would be needed with Slasher to achieve the same result. In summary, an extremely useful tool & one I can heartily recommend.

This product is known to lead to allergic conditions from repeated skin exposure – I wanted to highlight that although this product (Nananoic acid) is approved for organic gardening, it has been proven, and is mentioned on the label, that it may lead to allergic conditions (Not an just an allergic reaction, an allergic condition, meaning long term). So make sure you avoid skin contact, wear goggles and a face mask, and only… Read more

poison your weeds on days with very little wind. Treat this product like you would any other poison that could cause serious harm.

Here is a clinical paper that examined it’s effects on the skin of mice if you’re interested in some bedtime reading:

https://www.researchgate.net/publication/256983848_Induction_of_Thymic_Stromal_Lymphopoietin_Production_by_Nonanoic_Acid_and_Exacerbation_of_Allergic_Inflammation_in_Mice

Otherwise, I personally consider this product quite effective for spot spraying weeds and would certainly consider it a much safer alternative than Glyphosphate. HAPPY (AND SAFE) GARDENING!

Its time to shift away from Glyphosate (aka Round-Up) – Been testing with this product for about a year now in varying temperatures and conditions. Professional gardener, so I use these product types regularly. It has worked fantastically in warm conditions and used it last week on a cold miserable day for the first time and it still worked great! I used some Round-Up in the same garden on the same day… Read more

and a week later the weeds are barley yellowing with the standard concentration used, while at standard concentration with the Slasher, all weeds now fully dead.

You must apply a good coverage to achieve maximum results with Slasher while Round-Up acts systemicly and has a small advantage here. That said, Slasher is very fast acting and in my opinion a far superior product. Other complaints have been its a little more expensive, yes, that may be so, but the effectiveness on weeds is better and particularly for the home gardener a large bottle once a year should be plenty.

I feel now we need to be more conscience of what we are putting into the soil as a society also. Round-Up is a phosphate containing compound, which for Australian soils in particular should be avoided. So, by using this product, you are only doing your surrounding garden and environment potential damage. On top of that, we are now seeing court cases in the USA against Monsanto (the Round-Up creator). The last case (May, 2019) ordered Monsanto to pay 2 billion US dollars to the plaintiffs who have now likely obtained cancer from extensive use of this product.

Anyway, despite all this. Slasher actually works better than Round-Up.

Great when thirsty – Hi. Is this product safe to drink?. I diluted 70ml in 1 litre and drank the lot by mistake. This was about 10 minutes ago. Have a funny taste in my mouth atm. Show details ·  1

Amazing and easy – We used on broadleaved and fine weeds , grasses. It is amazing. Weeds die within hours. I don't understand previous reviews of ineffective outcomes. Perhaps incorrect concentration. Show details ·  1

Applied properly, this stuff absolutely works! – Pavers are easy to keep clear of weeds and runners with a little slasher ~ nothing likes this stuff, weeds begin to die within hours, and I can clean them away in a couple of days. I always shake the bottle for a minute before use, as I've found it to be consistently effective when i do Show details

Disappointed – Bought this wanting to do the right thing, it doesn't work!! I have tried it twice, no rain, shook the bottle, mild day etc. It doesn't work! I left a request to have my money reimbursed on their website but I haven't heard from them Show details

Doesn't do the job – Doesn't live up to the product claims. Spot weeded thoroughly one week and again one week later and still have same weeds. No rain to influence results. Buying something else to do the job.

Total Failure product – I normally use Roundup but decided to give Slasher a go as it doesn't contain Glyphosate. I bought the 5 litre container from Bunnings at $123.00 but to my horror it made all my weeds and grasses grow faster! The tall grasses were unaffected, and about half the broadleaf weed leaves turned a spotty black colour about 2 hours later but the… Read more

following day even they sprouted new growth and took over the garden. We are now 3 weeks later and I have a runaway Jungle and nothing has died. Today I bit the bullet and went back to Bunnings and bought Roundup again which I know works fantastic. I am very very disappointed with this Slasher product. What a waste of $123.00

Waste of time and money – Did not work at all, weeds are green and thriving although I used a stronger dilution than called for. A waste of time that I don't have!

Absolute Crap – I have gone over the areas to try and eliminate the weeds twice in 6 weeks. The second time I increased the dose even though the the first time was already a higher dose than the recommended. Feels like I am watering them and they thrive. Wish I read all the other reviews before purchasing...Now I have to do it a third time and get some real weed killer. If I could give zero stars I would..

Read the fine print – If you're expecting a quick visual result it's effective at higher dose rate. If your goal is to KILL weeds with one application, it's likely to disappoint hence lower rating - branded a "weedkiller" but I'd call it a retardant. Where I want a fast weed clean up, I combine Slasher with glyphosate - one knocks it back visually, while the other,… Read more

1-2 weeks later, kills weeds stone dead never to revive. Glyphosate much cheaper, much lower dose rate, saves time of ongoing applications but Slasher knocks neglected look of weeds when I've been slack with maintenance so, yes, it's got it's place for some.

Come in sucker – Have used this on same weed 4 times. Yes it goes black dies and resurrects after a few days. Bloody useless but does kill lawn dead. Have a patch of lawn 4 weeks after spraying still dead. I feel if you are going to sell something that does only works for s short time PUT IT IN LARGE PARINT ON CONTAINRER AND DON'T HIDE BEHIND EXPLAINING IN REVIEW WHAT HAPPENS WHEN USING THIS PRODUCT. Show details

Pretty useless, household vinegar works better – Very dissapionted with this product. It costs a lot. The roots are left alive and the weeds come back bigger and better Show details

Make sure you wear goggles - not simply a mask or glasses – This stuff is potent; it BURNS - especially your eyes - if you get the slightest spray drift! Until 2020, it was listed as Schedule 6, as it was believed to cause irreversible eye damage; but the (90% industry funded) APVMA persuaded the (96% industry funded) TGA that the damage was reversible, so it was downgraded to Schedule 5. Tell my eyes that! Show details

It does not kill weeds; it just dries the leaves in hours – It dries the dries the leaf of the weeds with a day. It works great in draughts, but after a good rain, the weeds come back to life. In saying that it is probably the best organic weed killer I've used so far. But compared to Glyphosate weed killers it is ineffective. However, Glyphosate weed killers gave me kidney Cancer, so I'm avoiding them. If… Read more

anyone knows of an effective Glyphosate free weed killer that actually kills weeds dead, please let me know.

Ok but – Works fine, however, when using the concentrate, the product separates from the water (it floats on top) and if you don't shake it well next time you use the stuff you have previously mixed you are probably spraying mainly water. Show details ·  1

Works well – Great product but would be helpful if dosage would be printed on the bottle, also with the pistol grip would be handy if it also had a fan spray. Other than that very happy although some weeds needed another application. Noticed a review about being corrosive, I have not had that problem maybe that the concrete was not up to scratch in the first place Show details

Not overly effective – Sprayed a cordyline that had reshot from a piece of root that was lodged in the soil which seems to have died off in the weeks following. I have however tried it on lesser plants (kikuyu, winter grass and other broadleaf weeds) to no effect. Show details

If you use it correctly – Root killed (roundup) no. Exhaustion of plant (a couple of times) and root dying yes. Thats what its for! One spray people, move on and maybe do some hard yakka. Show details

It seems to be killing onion weed – I have been using Slasher all day and the garden is looking great, kills clover and established onion weed which has been a scourge in my garden for years. Bought concentrate and mixed at 70ml per litre and have used 20 litres of spray today. Early autumn, NSW min 9 deg max 24 deg . Great quick results. Show details

Perfect spray if you care about your health and the environment – Don't believe the spurious 1 star reviews. This product is the ONLY thing I will use on my garden to ensure I am not filling my homegrown soil, flowers, herbs, vegetables and fruit with chemical residues. It is not a deep killer - but very few sprays are. Plants cannot grow without leaves - so give this a few applications and then wait and see. If… Read more

all you care about is the look of your garden - go use glyphosate. If you care about the health of your self, your family, your garden and whatever produce comes out of it - this is your best friend. My only issue is the smell - which I find overpowering for days.

Works amazing! – Nearly every time I have used slasher it has worked magic in hours, killing all the weeds established or not, tall ones and the huge clumps of winter grass too. The 2 times it didn't work I was unsure about my mixing ratio with water and was pretty sure it would be slightly weaker than it should be. To be sure I mix it slightly stronger than the… Read more

directions on the bottle and magic every time! I use this product for my business for clients that don't want nasty chemicals used.

Great for spot spraying – Excellent for spot spraying broadleaf weeds, although advanced weeds may need a second spray as indicated on the label. Better than Roundup on advanced Purslane/Portulaca, but takes 2-3 applications. Probably best to use a systemic herbicide on grasses. Overspray will only burn leaf it touches, therefore great to use among garden plants. Can be… Read more ·  1

used for broadleaf weeds in Kikuyu lawns. Lawn recovers in a few days. Too expensive to use on large areas, but great for the home gardener. I have used Slasher in this way for over 2 years. Also we had a problem with algae resulting from condensation from a refrigerated Air Conditioner on our concrete veranda. Slasher at the recommended rate kills this and only needs to be repeated about once a month. There is no damage to the concrete.

Query – Hi used slasher on my lawn to kill broadleaf, my lawn is now in a bad way will the grass grow back ? Lawn looks like straw needs , is there anything I can do ?

Fantastic! Worked really well – Sceptical when purchased but ONLY product on shelf at Bunnings. Bought 1Lts $12.98. Read instructions & weeds weren't wet, sun shining & got very hot. Lucky as it rained about 7 hours later & again today. Would have uploaded pic. Sprayed back path, weeds elsewhere & weeds dying before finished path. Very happy with result. Buying concentrate next visit when stocks finally back on shelf! Show details