In message , Nick Leverton
writes
In article ,
The Natural Philosopher wrote:
Roger Mills wrote:
On 10/06/2011 18:52, The Natural Philosopher wrote:
antiweed ground sheets don't stop weeds

Spray them off.


They don't *stop* them, but they *do* slow them down and stop them from
making tap roots, so they are easy to remove.

Gravel alone does that.

Gravel does not prevent weeds from making tap roots, and does not prevent
invasion by creeping roots.

I won't use poisons near the house, so am waiting until I can afford to
strip and re-lay the gravel beds. In the meantime it's a never ending
battle with (in my case) deep rooted thistles which have got a hold.

You could try a double layer of plastic mulch. As the NP says, weed
roots will penetrate. I wonder if horticultural (professional supplies
rather than garden centre outlets) would do a better job.

regards
--
Tim Lamb