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

https://telegra.ph/Electroculture-and-Compost-Tea-Synergies-for-Plant-Vitality-04-27

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.