Are cast iron outdoor tree boxes more durable than those made from mild steel?

When choosing outdoor tree boxes, durability is a key factor. Cast iron and mild steel are two popular materials, but which one lasts longer? Cast iron is known for its exceptional strength and resistance to wear, making it ideal for harsh weather conditions. However, it is prone to rust if not properly coated. Mild steel, while lighter and easier to work with, requires regular maintenance to prevent corrosion. Both materials have their advantages, but cast iron generally offers superior longevity with proper care. For gardeners seeking a sturdy, long-term solution, cast iron tree boxes may be the better choice.