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

https://jeffreytdct399.iamarrows.com/electroculture-for-heirloom-vegetables-preserving-flavor-while-boosting-growth

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.