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

https://www.scribd.com/document/1031077120/Electroculture-Greenhouse-Hacks-You-Can-Try-147606

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.