Limestone versus granite for yard edging
Limestone is soluble in water, especially acidic water (e.g. acid rain). That's why Florida has so many sinkholes; it's a type of karst topography where the water table dissolves the underlying limestone until the surface soil collapses into the void.

So, no: limestone isn't a good candidate for any stone edging that you'd want to be durable. It would be really bad for steps.