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

https://www.scribd.com/document/1027298804/ElectroCulture-Gardening-and-Compost-Enhancing-Nutrient-Cycles-164411

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.