The short answer is: it's complicated. While the natural, organic look of real rattan is highly desirable, its longevity outdoors is significantly limited compared to synthetic alternatives. Real rattan is a natural vine material. When left exposed to the elements, it faces several threats. Constant moisture from rain and humidity can cause it to swell, warp, and eventually lead to mold and mildew. Prolonged direct sunlight will dry out the fibers, making them brittle and prone to cracking and fading. Extreme temperature fluctuations further stress the material.
For real rattan to have any chance of lasting more than a single season outdoors, it requires exceptional care and ideal conditions. It must be placed in a fully covered, dry area like a screened porch or under a deep, waterproof pergola where it will never get wet. Even then, humidity is a concern. Regular maintenance, such as gentle cleaning and applying protective coatings designed for natural fibers, is mandatory.
For most outdoor settings—patios, decks, or gardens exposed to sun and rain—high-quality synthetic rattan (often called all-weather or PE rattan) is the practical choice. It replicates the aesthetic beautifully but is UV-resistant, waterproof, and designed to withstand temperature extremes with minimal maintenance. If your heart is set on authentic natural material, be prepared to treat it as delicate, portable décor for only protected spaces, or consider it for temporary seasonal use with the understanding it will have a shorter lifespan. Ultimately, for durable, long-lasting outdoor furniture that captures the wicker look, synthetic rattan is the reliable investment.