"The Medway Handyman" wrote in message
...
Looking for a weedkiller to kill off grass under decks. Weed fabric
usually does the job, but I want to be sure. Sodium Chlorate?

How far do they/does it spread sideways?

Engine oil? That seems to have done a bloody good job when I parked
something leaky on the "emergency parking" bit of my lawn (which has plastic
reinforcement).