Starter kit idea: one 6–8 foot wooden stake, 20–30 feet of 14–18 AWG copper wire, a mallet

https://www.scribd.com/document/1032037849/ElectroCulture-vs-Traditional-Gardening-Pros-Cons-and-Outcomes-185382

Starter kit idea: one 6–8 foot wooden stake, 20–30 feet of 14–18 AWG copper wire, a mallet, and weatherproof ties; install near tomatoes or squash and observe over a full season with careful notes.