granular vegetation killer
 

It seems to be pretty hard to find a total vegetation killer in granular
form, which I find easier to apply on a large area that I like to keep clear
for parking. I have found some out west on the web, but would like to find a
local Massachusetts or New Hampshire source that stocks this kind of thing
in 25-50 lb quantities. Any recommendations or suggestions on sources? I've
made a lot of calls.
Thanks.