What are the limitations of using polypropylene outdoor flower boxes in arid, high-heat climates?

Polypropylene outdoor flower boxes are popular for their lightweight and affordable nature, but they face significant limitations in arid, high-heat climates. Prolonged exposure to intense sunlight can cause the material to become brittle and fade over time, reducing its durability. High temperatures may also lead to warping or deformation, compromising structural integrity. Additionally, polypropylene lacks natural insulation, which can cause soil to overheat, stressing plant roots. While these planters are cost-effective, gardeners in hot, dry regions may need to consider more heat-resistant alternatives like ceramic or fiberglass for long-term use. Proper maintenance, such as shade placement and UV-resistant coatings, can help mitigate some issues but may not fully overcome these drawbacks.