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

https://jeffreyecvl252.timeforchangecounselling.com/what-plants-respond-best-to-electroculture

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.