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Spraying long grass

Hi All

I look at a job the other day it a piece of wast ground with long grass and weeds in it!

The cline what it cut down and weedkiller use on it, then put matting over the top!

Now how the best way of doing this, please?

Do I cut back then spray and I leave it for some day before putting the weed matting down?

Or spray fist leave it then cut back leave the matting down?



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  • i've seen it done successfully if the sheeting is heavy duty enough no need to spray or even cut down just sheet it and the stuff underneath dies. As long as the weeds are the soft type not woody bushes etc. But it needs to be premium type weed sheet for this method to work

    • Thanks for the help Billybop The problem is the client got the sheeting and I bet it not that heavy duty enough?


      • yes that's not necessarily the way I would do it, I think these people didnt have a strimmer so they put the cloth over the vegetation which was 3 foot tall and pegged it down at the edges! After a few days all the grasses and weeds underneath collapsed. Personally I would strim off everything at ground zero first, allow a few days regrowth, then apply herbicide. And then fit the sheeting soon afterwards held down with plenty of galvanised U-shaped pegs. And ensuring a generous overlap of sheeting where there is a join

  • if you are going to spray it you have to do it first or they will not be anything to spray unless you let it grow again 

  • PRO

    I would spray then leave a week and then cover but as billbop has said if the membrane is very good quality and just annual weeds and grasses it can just be covered over. Strimming it down after a week will give a better level for the membrane.

    • Thanks for your help, Dave :-) I do this way the other problem is it got a slop in there so I have to be careful!


  • What weedkiller would you use for it please? Dose the weedkiller go off if part use at all, please?

    • "Gallup" glyphosate 360 is what I am using at the moment. Seems to last pretty well if left diluted in the sprayer. One 5 litre tub  of concentrate lasts me all year as just letting weeds proliferate then loads of remedial spraying is bad practice

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