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

https://dallasksyf683.wpsuo.com/electro-culture-gardening-for-lavender-and-aromatics-scent-and-strength

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.