When selecting planter boxes for urban spaces exposed to freezing temperatures, durability is paramount. The most crack-resistant materials are those that can expand and contract without fracturing. Fiberglass-reinforced polymer (FRP) is a top choice due to its flexibility, lightweight nature, and excellent resistance to thermal stress. It won't crack from freeze-thaw cycles. High-quality concrete planters, especially those with air-entrainment or fiber reinforcement, are also highly durable if properly sealed. Modern composites like recycled plastic lumber offer good performance, as they are inert and flexible. Avoid untreated terracotta or thin ceramics, as they absorb water and crack when it freezes. For longevity, ensure any material has proper drainage and consider adding insulation for extreme climates.
What is the most durable material for urban planter boxes that won't crack in freezing temperatures?
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