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

https://telegra.ph/How-Weather-Affects-ElectroCulture-Sun-Wind-and-Storms-05-16

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.