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

https://telegra.ph/Electro-culture-Gardening-for-Seed-Starting-and-Germination-05-14

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.