Cast iron is known for its strength and resistance to wear and tear, making it an excellent choice for outdoor applications. Unlike wooden fences that can rot, warp, or be eaten by pests, cast iron requires minimal maintenance over the years. It can withstand harsh weather conditions, including rain, snow, and ultraviolet rays, without deteriorating. Even if the paint chips, the underlying metal remains intact, allowing for easy touch-ups that can restore its original beauty. When properly maintained, cast iron picket fences can last for generations, making them a worthy long-term investment.