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Systemic Weedkiller

• Message 1. 

  Posted by BensGrandad (U7827628) on Thursday, 26th May 2011

  I have built a raised bed in my greenhouse but a weed has grown up under the greenhouse by the side of the raised bed. Could I use one of the branded weedkillers which come ina spray version and spray on them. My concern is that the weedkiller will spread and thus kill the cucumber and tomatoes growing in the bed. The one I have seen advertised on TV a lot is R....va

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• Message 2

  , in reply to message 1.

  Posted by thedogcody (U14659366) on Thursday, 26th May 2011

  Weedkiller cant move through the soil-it becomes inactive on soil contact-but be very.very careful- tomatoes only need to smell the label on weedkiller to succumb and I would never use in a confined space such as a greenhouse- can you not just pull it out, cut it down, or live with it till end of season?
  I use a flame gun in greenhouse for that reason
  Hope this helps
  Geoff.

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• Message 3

  , in reply to message 2.

  Posted by BensGrandad (U7827628) on Thursday, 26th May 2011

  Many thanks I will have to just keep pulling it up

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• Message 4

  , in reply to message 3.

  Posted by zoomer44 (U14019069) on Thursday, 26th May 2011

  Bensgrandad, do you know what the weed is, I have rashberries coming up ramdomly in my garden and would call this a weed but many wouldn't.
  
  A weed is only a weed if you don't want it there, The reason for asking is there might be something specific which you can do to get rid of your weed.

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• Message 5

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  Posted by BensGrandad (U7827628) on Friday, 27th May 2011

  Its a single long winding weed which looks like a piece of string with leaves on it.

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• Message 6

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  Posted by zoomer44 (U14019069) on Saturday, 28th May 2011

  I don't recognise it from your discription.
  
  You could keep pulling it out which would eventually weaken it and if it's growing in your garden ourside the GH use the systematic weed killer on it there.
  
  I don't see why you couldn't spray the plant in the GH, making sure you shelter other plants from the spray. A systematic weedkiller should only kill the plant it touches.

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• Message 7

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  Posted by BensGrandad (U7827628) on Saturday, 28th May 2011

  That is what I thought but one poster said about tomatoes only need to smell the label of a weedkiller for it to kill them off so was a little apprehensive.

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• Message 8

  , in reply to message 5.

  Posted by Engineer (U3135859) on Sunday, 29th May 2011

  Its a single long winding weed which looks like a piece of string with leaves on it.  This sounds like bindweed. A tried and trusted method is to train it up a stick and then paint weedkiller on it with a brush, or wear a rubber glove with a cotton glove over the top. Wet the cotton glove with weedkiller and run your gloved hand up the length of the weed. This should prevent any weedkiller getting on to other plants in your greenhouse. Bindweed will re-grow from even a tiny piece of root, so unless you remove the roots entirely or kill the plant and roots using a glyphosate based weedkiller on the leaves, it will come back.
  I agree with others - don't use a spray inside (or even near) a greenhouse!
  I have eliminated bindweed from my garden this way, but it did take a few years!
  Good luck -- Bob

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• Message 9

  , in reply to message 8.

  Posted by farmerSteve (U2644680) on Sunday, 29th May 2011

  whatever you do never use any type of hormone weedkiller anywhare near tomotoes just storing them in the green house will be enough to kill them
  roundup will be perfectly safe but I would not use it as a spray in the grrenhouse just paint it on
  I am afraid it is not very good on bindweed which is what it sounds you have got

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• Message 10

  , in reply to message 9.

  Posted by northwards (U14324094) on Sunday, 29th May 2011

  I agree with everything that has ben said about the dangers of using or even storing weedkiller in a greenhouse full of plants.
  
  If it really is bindweed, there's a good chance it may also appear outside the greenhouse - the roots go everywhere and you rarely get just one shoot coming up. Keep an eye out for it outside, and if it appears you can attack it there. If you can kill off the roots you should be able to get rid of the growth in the greenhouse as well

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• Message 11

  , in reply to message 10.

  Posted by BensGrandad (U7827628) on Monday, 30th May 2011

  Moththat she used to kill brambles at the bottom of her gardener gave me some weedkiller sodium chlorate?? which is now not available in shops but if I can locate the root of this bindweed and it is probably outside of the greenhouse it should be ok to apply it there I would think. Again will this travel through the ground or as somebody said die before it can spread.

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• Message 12

  , in reply to message 11.

  Posted by Logissimo (U14020652) on Tuesday, 31st May 2011

  No, no, No!!!! BG
  
  Sodium Chlorate moves around in the soil and is a total, non-selective plant killer; beware!
  
  As other have said use Roundup but only apply it to the leaves of the plant(s) that you want to kill. In your case you could paint it onto the leaves with a small brush or with a cotton glove as someone said. I think you can even buy litttle pots of gel with a little brush for this very purpose.
  
  I wouldn' have Sodium Chlorate anywhere near my garden.
  
  Hope you soon solve your problem L

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• Message 13

  , in reply to message 11.

  Posted by thedogcody (U14659366) on Tuesday, 31st May 2011

  Sodium chlorate is a total plant killer, is not very nice stuff and that is why it got banned for garden use .
  As I and other posters have said be really careful using weedkillers in the confined space of a greenhouse with plants growing- I am just saying I wouldn't-but if this weed bothers you that much paint on leaves with Roundup.

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• Message 14

  , in reply to message 13.

  Posted by BensGrandad (U7827628) on Tuesday, 31st May 2011

  Thanks to everybody who has contributed to this and given me advice. I shall heed it but the only way to learn is to ask somebody who does know what you dont. Once again many thanks.

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