Re: Organic weed removal?
What I do here is keep on hand big sheets of plastic, and during hot, sunny stretches, I weight down the plastic with stones on top of the weedy areas and solarize the unwanted growth to death.
You have to leave the plastic in place for a week or two (or preferably more) which is inconvenient parking-wise, but it’s effective. I do this on one stone path in particular. The weakened, “baked” weeds are easy then to dislodge with a big old discarded kitchen knife (or you can keep cooking until they are really goners).
There are also acetic-acid-based herbicides (the stuff in vinegar, but stronger) if you choose to go the sprayer route, but use caution as they are still powerful.