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

https://riverwioz373.timeforchangecounselling.com/electroculture-gardening-for-urban-growers-balcony-and-small-space-setups

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.