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

https://telegra.ph/The-Electroculture-Starter-Kit-Materials-Designs-and-Safety-Basics-04-06

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.