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

https://arthurelps397.huicopper.com/electroculture-in-arid-landscapes-greener-growth-with-less

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.