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

https://stephenfrjj694.image-perth.org/garden-design-principles-with-electroculture-in-mind

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.