I used Round up near to plants with long root systems and suspect collateral
damage.
Paraquat Diquat mixtures are deactivated by the soil,safe to use, but not
especially good at penetrating root systems.They just burn off the tops of
weeds.
Regards
David T
"Charlie Pridham" wrote in message
...

"Uncle-C" wrote in message
ups.com...
Hi,
I'm having probs with perennial and annual weeds and was wondering
which of the current herbicides are most harmful to rose bushes and
hence not suitable for use when spraying surrounding weeds.

Cheers,
Uncle

Don't spray, use a trickle bar or similar. I find Round Up particularly
unforgiving if it gets on roses.

--
Charlie, gardening in Cornwall.
http://www.roselandhouse.co.uk
Holders of National Plant Collection of Clematis viticella (cvs)