Plant safe moss killer.

[Wingedharpy]

Can anyone recommend a plant safe moss killer for the edge of my path?
The edge slopes down towards the flower bed so anything I use will invariably trickle into those beds.
I've gently scraped off as much as I can but don't want to gouge out crumbly cement work and end up with wobbly flagstones.
Happy to take advice regarding shop bought products or home made potions.
Many thanks.

White vinegar in a spray bottle, followed by a good stiff brush in a few weeks. You might need to do it several times though.

@bamboocat, do I use the vinegar neat or do I need to dilute it?
Many thanks for the tip.

Neat, and just spray it on. Do it on a still day so the wind doesn't carry the spray.

You might have to do it a few times.