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

https://edgarbrjj562.yousher.com/electro-culture-gardening-for-beginners-avoiding-the-top-10-pitfalls

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.