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What do I do with weeds killed by Roundup?

Discussion in 'In the Garden' started by homemove, 16 Aug 2016.

  1. homemove

    homemove

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    Hi everyone,

    I had a lot of weeds growing around my house external walls & patio. I've used Roundup Ready to Use and now it's been approx 2-2.5 weeks and they all seem to be dead (brown & bone dry).

    I'm just not sure what to do now...do I pull them out or do I simply clip them off at their lowest point?

    Also is it the right time or do I need to wait longer before getting rid of them?
     
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  3. glasgowdan

    glasgowdan

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    Just buzz them off with a strimmer and brush up.
     
  4. homemove

    homemove

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    Thanks glasgowdan.

    I don't want to tp trim too early, so How many weeks, after spraying roundup do I need to wait before trimming them off?
     
  5. The handy thing about products like Roundup is that they tell you in the instructions how long they take to act on different types of weeds.

    I would forget the strimmer and pull out the dead weeds complete with roots.
     
  6. JohnD

    JohnD

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    if you disturb the ground by pulling them up, you will get a new crop of weeds. Glyphosate (Roundup is just the trade name that doubles the price) kills the roots so you can snip them off and let them rot away. It does not poison the soil. Your strimmer and a rake will tidy the surface.

    If you want to prevent regrowth, use Pathclear and don't disturb the surface.
     
  7. homemove

    homemove

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    Thanks for clarifying that guys.

    @JohnD - Isn't pathclear similar to Bayers super weed killer with granules to dissolve in water?

    The reason I ask is because I mixed a very strong concentrate of Bayers (1 sachet to 1ltr of cold water) and left it for upto 4 weeks, but not a single weed died.

    What's different about Pathclear?
     
  8. JohnD

    JohnD

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    pathclear includes a chemical that lies on the surface of the soil and prevents seeds germinating.

    If you hoe, rake or disturb it, you break up this layer and the weeds start again.

    It also includes glyphosate which is absorbed into green leaves and slowly kills the existing plants, but does not persist in normal soil. The plant circulates it from the leaves to the roots. It is no good if your pour it onto the soil.

    Bayers is a chemical and pharmaceutical company. I don't know which of their products you mean. Do you mean you didn't use it as directed in the instructions? Popular weedkillers most often contain glyphosate, but as the patent has expired the companies like to disguise the fact and call it by some fancy brand name so consumers will pay more. Own-brand supermarket glyphosate is much cheaper.
     
  9. glasgowdan

    glasgowdan

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    No, don't do this. For a couple of reasons. One, as someone else has mentioned, you then disturb the soil and effectively cultivate little bits of it for dormant seeds to germinate or new ones to blow in and seed. Also, if you're going to hand-weed anyway, what's the point in weed killer?

    If you've treated the weeds with glyphosate then the roots will be DEAD. Strim the tops off to get them out of sight. They won't grow back. 4 weeks is a good time to wait to do this.

    I'm a professional ground maintenance contractor and have been doing it for 7 years. I have PA1 and 6 and always make sure things are done properly. I apply at least 1000 litres of dilute glyphosate each season. People use weed killer in order to clear areas from weeds without spending hours on their hands and knees pulling them out.
     
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  11. homemove

    homemove

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    Thanks JohnD & Glasgowdan

    I'll take your advice and will leave the weeds for another week or two and then I'll clip them from as close as possible to the ground.

    @ JohnD - This is what I used:- Bayer Garden Super Strength Weedkiller

    I dropped one whole satchet in 1 litre of cold water and then mixed it until the granules dissolved. I'm sure this is how it's done, isn't it?

    @glasgowdan - Being a professional gardener, could you please tell me, how do I control a huge patch of strong weed, such as brambles, grass, dandelions etc (I have no idea if these are the correct names for them), without costing lots of money?
     
  12. JohnD

    JohnD

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    One litre of water and you then sprayed it over the foliage only, to thoroughly wet the leaves? That's the correct way.

    As your link says:

    Active ingredients

    • Glyphosate
    Unless you only need tiny quantities, look round supermarkets, hardware and diy sheds for a litre of glyphosate and compare the cost. Wilkinsons sometimes have 1-litre bottles.

    Resolva, Roundup and (most) Weedol are Glyphosate with a brand name on the pack.

    There might be a shortage at the moment as the licence was due to expire in June, but has now been renewed pending safety studies.
     
    Last edited: 17 Aug 2016
  13. homemove

    homemove

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    Thanks JohnD. There are many unbranded Glyphosate versions, but how can I be sure that the one I'm getting is one of the strongest available?

    Can you recommend an unbranded Glyphosate for me....just make sure that it's concentration is very very strong.
     
  14. All that glyphosate, most impressive. I'm sure your approach is fine for the types of properties you maintain.
     
  15. glasgowdan

    glasgowdan

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    Gallup os a cheap concentrate glyphosate. Not as 'safe' as roundup, which has some other surfactants added.

    Re the big patch of stuff you want to kill...Yes, I'm going to suggest glyphosate! It kills brambles on a single treatment. Once they're dead I'd chop them up with a hedge trimmer and rake up the bits.
     
  16. JohnD

    JohnD

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    I don't think that makes sense. You dilute it with water to the correct dose. You might as well say "what's the strongest brand of sugar."

    Glyphosate is a standard chemical, a commodity. The only reason the makers put additives in or colour it pink is so they can charge more for a "New! Improved!" formulation. Roundup only got the kickers added when the patent expired, to try to trick punters into paying a higher price for the same thing.
     
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  17. r896neo

    r896neo

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    Its not some big conspiracy john. I'm sure there is a premium to pay for the roundup brand name but it is not exactly the same as other generic glyphosate products. I have found roundup much more effective on certain weeds than gallup or similar because it has extra adjuvants that make it better for some things. I am talking about roundup pro bio 460 which is the professional version here. Cant speak for the retail product.

    As for your brambles use sbk or a woody type weedkiller, its more effective against brambles than glyphosate.
     
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