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

https://telegra.ph/ElectroCulture-Safety-Basics-What-Every-Gardener-Should-Know-05-05

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.