In article ,
Grimly Curmudgeon writes:
We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember "The Medway Handyman"
saying something like:

Looking for a weedkiller to kill off grass under decks. Weed fabric usually
does the job, but I want to be sure.

Roundup or one its clones.

Isn't that glyphosphate based?
If so, it will only kill what's currently growing.
By design, it is deactivated when it hits the soil,
so it won't stop new plants growing afterwards.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]