Are cast iron outdoor tree boxes heavier than concrete alternatives?

When choosing outdoor tree boxes, weight is a crucial factor for stability and durability. Cast iron tree boxes are generally heavier than concrete alternatives, offering superior resistance to wind and weather. Concrete tree boxes, while still sturdy, tend to be slightly lighter but may crack over time. Cast iron's density provides long-term durability, whereas concrete requires more maintenance. Consider your project's needs—cast iron for permanence or concrete for easier relocation. Both materials enhance garden aesthetics, but their weight differences impact installation and longevity.