Materials matter: copper resists corrosion and conducts well

https://www.scribd.com/document/1023748709/Electroculture-for-Pollinator-Friendly-Gardens-Attract-Bees-and-Butterflies-225347

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.