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Thistles spreading like wild-fire.


 
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Annamoe99
Rank attained: Hazel Tree
Rank attained: Hazel Tree


Joined: 13 Jan 2009
Posts: 20
Location: Annamoe, Co Wicklow

PostPosted: Mon Aug 24, 2009 8:28 am    Post subject: Thistles spreading like wild-fire. Reply with quote

Can anyone tell me how to get rid of thistles from my lawn. The whole lawn is infested with them and they are spreading like wild-fire

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James Kilkelly
Rank: Site Admin


Joined: 30 May 2006
Posts: 2142
Location: West of Ireland

PostPosted: Mon Aug 24, 2009 9:00 am    Post subject: Reply with quote

First off keep the lawn well fertilised and cut regularly to build up a thick grass sward.
Thistle seeds love to land in thin grass as they will germinate with ease.

To kill the existing thistles with a selective herbicides, select one containing the active ingredient mecoprop. This is available in for example in the product Hytrol Clover Lawn Weedkiller manufactured by Hygeia and Clovotox manufactured by Bayer.

Applying a lawn fertilser to your grass approx two weeks before applying selective lawn weedkillers will improve results. Weedkiller application is most effective while the weed is actively growing, between the leafing to flower stage of growth. For best results, apply selective weedkiller to the lawn on a day forecast to be dry. Apply on a calm morning (no drift) once the dew has dried.

With most lawn weedkillers expect to apply two or three applications at 6 week spacings to rid your lawn of the weeds and the regrowths from their seeds. Always read carefully the instructions supplied with the weedkiller, and follow them to the letter especially regarding protective equipment and the care of children and pets.

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Annamoe99
Rank attained: Hazel Tree
Rank attained: Hazel Tree


Joined: 13 Jan 2009
Posts: 20
Location: Annamoe, Co Wicklow

PostPosted: Mon Aug 24, 2009 9:10 am    Post subject: Reply with quote

Thanks a lot for that. Can you recommend a lawn fertiliser ?
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michael brenock
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Joined: 12 Aug 2008
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PostPosted: Mon Aug 24, 2009 11:34 am    Post subject: Reply with quote

if the thistles are in a lawn then they must be creeping thistles and regular lawn mowing will prevent the development of the thistles to full maturity and they will not be able to produce seed. Try using glyphosate (roundup) strongly diluted, by applying it with a brush or sponge. In this way the grass is not killed, Apply 10-10-20 fertiliser to the lawn now and dont cut too low down.
michael brenock horticultural advisor (retired)
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