What are the thermal conductivity differences between cast iron and aluminum outdoor flower boxes?
When selecting outdoor flower boxes, understanding the thermal conductivity differences between cast iron and aluminum is crucial for plant health. Cast iron has a lower thermal conductivity (around 50 W/m·K), meaning it retains heat longer and provides more stable temperatures for plant roots. Aluminum, with high thermal conductivity (approximately 200 W/m·K), heats and cools quickly, which can stress plants in extreme weather. For cooler climates, cast iron’s heat retention is beneficial, while aluminum suits moderate environments. Choose wisely based on your local climate and plant needs.
