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

https://jaspercymx504.cavandoragh.org/maximizing-tomato-yields-with-electroculture-techniques

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.