Killing Seeds

[Oleanda]

My neighbour has, at last pulled up or chopped down, the weeds on his side of the footpath between our houses, trouble is, there are now millions of tiny seeds all over the path, which the prevailing wind will deposit in my garden. I have swept up and binned a lot of them, but there are still at lot that I cannot. Is there anything that I can spray on them to stop them germinating?

[scooping]

Diluted bleach in a spray bottle.