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

https://cristiangugz086.bearsfanteamshop.com/electroculture-gardening-case-studies-from-real-gardens-1

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.