"brian stanton" wrote in message
...
You could spray it with something like Roundup a week or so before
putting
in the new soil to kill the old stuff.


Nice one, that gives me something to go at, thanks Ralph


I mentioned Roundup. For that to kill off the old stuff, it takes a week or
two as far as I understand it, it does not really kill off the stuff, but
prevents it from absorbing something the grass needs to grow, so it will
take a while for it to be effictive. There may be some other chemicals that
you may want to look into.
I don't know what is out that will kill off everything fast.