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

https://daltonbcvh980.cavandoragh.org/diy-electroculture-projects-spirals-rods-and-coils

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.