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

https://thrivegarden.com/pages/what-you-need-to-know-about-hidden-fees-in-electroculture-gardening-orders

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.