Q: Is there a product that will control grass and weeds on a cemetery plot?
A: There are several soil sterilants available.
The biggest caution I can give you is that these chemicals will affect ALL plants in the plot and nearby. They may kill trees whose roots run under the plot. Do not use them unless you are sure they will not affect nearby plants.
Green Light Com-Pleet
Spectracide Total Vegetation Killer
Enforcer Next Day Edger
Ortho Total Vegetation Killer
Ortho Ground Kleer
Ortho Season Long Grass and Weed Killer
Bonide Kleenup Plus
Bonide Vegetation Killer
Schultz Total Vegetation Killer