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

https://cristiangugz086.bearsfanteamshop.com/is-electroculture-right-for-you-cost-benefits-and-roi-for-home-gardeners

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.