Materials matter: copper resists corrosion and conducts well

https://daltonbcvh980.cavandoragh.org/electroculture-gardening-for-pollinators-enhancing-blooms-and-habitat

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.