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

https://medium.com/@holtoncqdi/electroculture-workshops-what-youll-learn-c83dc6b27d6b

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.