The weather is finally good enough for me to spray weeds at the side of
the house and I have a spray container made with Roundup concentrate
probably almost a year ago. Will this still kill the weeds? I know they
say that it decomposes into some non-toxic form within two weeks of
spraying, so I figure it isn't terribly stable. Does anyone know if it
will still work? I used it, but don't want to have to wait a week or two
to find out if it's a waste of time waiting. Thanks for any info.

Dan