A basic setup involves a wooden pole, a copper spiral winding upward, and a grounding spike or buried wire
https://thrivegarden.com/pages/the-role-of-materials-in-pricing-electroculture-gardening-products
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.