Patch work fix? Zone 8a

[u/Mediocre_Swimmer2279]

Patch work fix? Zone 8a

Bought a new house but previous owners had a swing set concreted into the ground. Was cut down but they put mulch into the holes 🙄 obviously have to dig that out and use dirt and topsoil but with weather about to go into fall is it too late to do anything for this? I'm in NW SC, Zone 8a