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

https://www.scribd.com/document/1033105369/Vertical-Gardening-with-ElectroCulture-Save-Space-Boost-Growth-154312

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.