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Replies

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  Eugene Baston February 16, 2014 at 8:17pm

  Personally I'd get all available weeds up now....wait until next month....then spray the emerging stuff. Once dead, I'd spray the new emerging stuff and get on with the job 6 weeks from now.

  Cheers, Eugene
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  Geoff Norfolk February 16, 2014 at 10:04pm

  I think that might be unnecessarily time consuming and I expect Mark wants to get the job completed next week rather than come back in 6 weeks. I'd just spray the lot with Round-up now....... not the ideal time I know but does work given time...... and then put the fabric/gravel down on top. The fabric alone should be enough to kill most weeds but the Round-up should make sure.
• PRO

  Luke brooks February 16, 2014 at 11:00pm

  Anything above 10c and the grass grows so definitely the weeds will be growing, weed big stuff first then spray with round up on Wednesday afternoon when dry and cover with matting, should do the trick
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  Matt Johnson February 17, 2014 at 7:24am

  if you are putting a membrane down spraying won't be a necessary, just clear the weeds and any left will die off anyhow.. spray after, once the airborne weeds root themselves in!
• PRO

  Stuart @ Eco Garden Maintenance February 17, 2014 at 1:26pm

  There are numerous weeds that will penetrate through a membrane so i would spray prior to laying it. It will probably need doing after as well. Bindweed, couch grass, horse tail and ground elder are pretty persistent weeds that often take a few hits with weedkiller.
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  Colin Hunt February 17, 2014 at 2:18pm

  Spray with herbicide, leave for a few days, chip off bulk of foliage and away you go.
• PRO

  Nick @ NM Garden Services Ltd February 17, 2014 at 7:45pm

  
  Exactly as Colin says - although I would prefer to wait for a few signs of dying back before the bulk of the foliage was chipped off.
  Colin Hunt said:

  Spray with herbicide, leave for a few days, chip off bulk of foliage and away you go.
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  Geoff Norfolk February 17, 2014 at 10:08pm

  So many different answers must be really confusing!! I would have thought applying a total weedkiller could well affect shallow rooted shrubs. I can't quite see the point of "chipping" off the weed leaves after a few days unless they're significantly obstructing the membrane..... the longer the Round-up is left on the leaves, the better absorption which is pretty slow this time of year. I've always found it very rare for any weeds to grow through a membrane though I've found plenty that grow above it, sending their roots through it into the soil below..... they can be a right pain to remove!
  Personally, I hate membranes............ they've the annoying habit of poking their ugly black edges out of the ground and don't stop the weeds growing above them..........I prefer a good thick mulch of chippings/bark or if you're going to use gravel, just put it down quite thick and be prepared to spot-treat the odd weed that will appear.