A basic setup involves a wooden pole, a copper spiral winding upward, and a grounding spike or buried wire

https://kameronotff660.theburnward.com/electroculture-for-cut-and-come-again-greens-continuous-harvests

A basic setup involves a wooden pole, a copper spiral winding upward, and a grounding spike or buried wire, positioned near crops to capture atmospheric ions and gently influence local electrostatic conditions.