A basic setup involves a wooden pole, a copper spiral winding upward, and a grounding spike or buried wire
https://www.scribd.com/document/1034536759/ElectroCulture-for-Culinary-Gardens-Flavor-Forward-Growing-229124
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.