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

https://www.scribd.com/document/1023318802/Electroculture-for-Drought-Prone-Regions-126543

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.