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

https://www.scribd.com/document/1031631349/Copper-Tape-Wire-or-Rods-Choosing-Materials-for-Electroculture-Gardening-159241

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.