When sourcing outdoor decor, material selection is the most critical factor for durability. Prioritize UV-resistant plastics (like HDPE), powder-coated aluminum to prevent rust, and grade 304 or 316 stainless steel for hardware. For wooden items, ensure they are made from weather-resistant species like Teak, Acacia, or Eucalyptus, and verify they have been treated with waterproof sealants. For solar-powered decor, check that the IP (Ingress Protection) rating is at least IP44 or higher to ensure protection against rain and dust.