Removing old irrigation valves and wiring carelessly with a shovel poses several risks and is not a good idea. This approach might sever connections or damage underground pipes, which can be costly to repair.

Additionally, if the wires are still connected to an electrical source, there is a risk of electrical shock or short-circuiting, which can be dangerous. Before removing the valves, it would be wise to ensure that all electrical connections are safely disconnected and that the valves are not under pressure from the system.

A safer approach would be to carefully excavate around the valves, ensuring all connections and pipes are fully exposed. Once visible, disconnect the valves properly, cap any live ends or open pipes, and ensure that the area is safe and ready for planting. This method will protect the existing system’s integrity and ensure safety throughout the process. After proper removal, filling the space with soil and planting a shrub as desired can proceed safely.