Materials matter: copper resists corrosion and conducts well

https://telegra.ph/ElectroCulture-Gardening-and-Companion-Planting-A-Winning-Combo-05-15

Materials matter: copper resists corrosion and conducts well, while galvanized steel is cheaper but heavier; choose durable wood or bamboo for masts, and avoid treated lumber that may leach chemicals.