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/1026635603/Harnessing-the-Sky-A-Beginner-s-Guide-to-Electroculture-Gardening-for-Bigger-Healthier-Harvests-139838

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.