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

https://jaspercymx504.cavandoragh.org/electroculture-in-arid-climates-techniques-for-heat-and-sun

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.