For balcony growers, compact coil pots use a small copper helix inserted into the medium

https://thrivegarden.com/pages/whats-the-financial-outlay-required-to-begin-electroculture-gardening-successfully

For balcony growers, compact coil pots use a small copper helix inserted into the medium, aiming to localize subtle charges near roots without requiring tall poles or complex grounding arrangements.