Weeds Control Advice Needed

I'm looking for some advice because we're not too happy with the weed killer we've been using. Our lawn and garden are about 200m². So far, we've tried:

Kiwicare 2L Lawnpro Turfclean And Green Rapid+ Hose Pack
https://www.bunnings.co.nz/kiwicare-2l-lawnpro-turfclean-and…

Yates Weed n Feed Lawn Weed Killer and Fertiliser 4 litre
https://www.mitre10.co.nz/shop/yates-weed-n-feed-lawn-weed-k…

We're now considering the Kiwicare Turfclean Ultra Concentrate 800ml, which was recommended by someone at Mitre10:
https://www.mitre10.co.nz/shop/kiwicare-turfclean-ultra-conc…

I've also come across glyphosate in my research:
https://www.sprayshop.co.nz/products/ken-up-glyphosate-360-5…

Here are my questions:

What's a good product that gives decent results without costing too much?
Should I be using the same product for both the lawn and garden, or different ones?
Should I spray the entire area, or just focus on problem spots (precision strike)?

Comments

  • +1

    What condition is your lawn in? If it's bad then you may need to resow the lawn (or at least areas that are patchy). The hard part is matching the grass type to what you already have as there are many different blends which will look quite different to your current lawn if you get the wrong one.

    The weedkillers you have listed above kill diffferent types of weeds.
    Turfclean will kill broadleaf weeds, leaving fine grass intact. If you have weeds that don't have a broad leaf then this won't kill them.
    Gyphosate on the other hand is broad spectrum and will kill or at least knock back whatever it comes into contact with. This will kill your grass too. In fact it is best used as a weedkiller for grass type weeds. Many broadleaf weeds will not die with glyphosate.

    Unfortunately there isn't a one size fits all approach.

  • +2

    The first three products kill weeds and leave grass alone (selective herbicides). Glyphosate will kill everything (non-selective herbicide).

    Generally selective herbicides are going to be slower and less effective than non-selective herbicides like glyphosate. Glyphosate can be got very cheaply from Mitre 10 and Bunnings home brands as a concentrate. If it doesn't work fast it enough, blends of glyphosate and more potent weed killers like saflufenacil will be faster but more expensive and more toxic.

    If you are spraying in your garden carefully in-between plants or carefully only on weeds in your lawn, a non-selective herbicide like glyphosate is what you want. If you to spray your whole lawn you want a selective herbicide. I can't really speak to selective herbicides as I let anything grow in my lawn if you are trying something new check to see if the active chemicals are different. If one brand of a chemical doesn't work for you another brand of the same chemical won't either.

  • +1

    I've tried Yates Weed n Feed on the lawn to try and reduce clover. It didn't make any difference.

    Glyphosate = Roundup
    Their patent expired in 2000 so now many other brands use it.
    https://en.wikipedia.org/wiki/Roundup_(herbicide)
    … patented glyphosate … and marketed it as Roundup from 1973 … exclusive rights to glyphosate until patent expired in 2000 ….similar products use it as an active ingredient

  • NZLA - New Zealand lawn addicts Facebook group has lots of advice.

    Glycosphosphate is non selective and will kill your grass. It's the strongest weed killer and you should just buy the cheapest version based on how concentrated it is, there is no difference between brands.

    Kiwicare Turfclean Ultra Concentrate is selective and works for a lot of weed (not all) and gets recommend on nzla for mixed lawns as a potential option.

    There are other more powerful selective weed killers and pre-emergent weed killers that will kill more weeds but are only compatible with certain types of grass. If you have a mixed seed lawn you can't use these ones.

    There are also different options including fertilizers to make your lawn outcompete certain weeds etc, it's actually quite complicated and depends on your type of grass and type of weeds and soil composition etc.

  • +2

    If you spray weed and feed or the likes on your lawn, do not add the grass clippings to your compost. Certain plants will die or grow with deformaties if you then add that compost to your garden. Have heard tomatoes, beans etc. Read up on killer compost

    • We don't do compost but it's good to know. Cheers.

  • +1

    We tried some organic/natural one.. it's far better than I thought it would be.

    https://www.mitre10.co.nz/shop/search?text=Kiwicare%20Weed%2…

  • Just bought Kiwicare Turfclean Ultra Concentrate 800m. $39.74 after pricebeat. Will try it out.

  • Since glyphosate kills everything, is it a perfect option for weeds on the drive way?

    • +1

      Keep in mind that it needs to be sprayed on actively growing weeds and has no long term properties.
      Any weed seeds present on your driveway but not yet germinated will still grow and need to be sprayed when growth is visible.
      It is a cheaper option though, particularly if you go with the generic brands.

  • You will need to get a sprayer as well. I think one of the brands is superior but i can't remember which one it is.

    • Solo?

      • I've done done reading.

        It seems people recommend:
        Solo (various), Yates 5L, hozelock 5L, Ryobi battery sprayer.

  • I just do chlorine powder with water as its cheaper than weed killer - more chlorine less water does the job

    • Is it better than glyphosate?

      • dunno, if it doesn't do the job I'll just go get some diesel and pour it on there

  • 2,4-D for broadleaf and Glyphosate for anything else or spot spraying.

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