Muons, subatomic particles produced by cosmic rays, can penetrate buildings and pose potential health risks. While traditional shielding methods like lead or concrete are effective, they are often expensive and impractical for everyday use. Could an outdoor plant box filled with dense vegetation serve as a natural alternative for muon shielding?

Plants, especially those with thick foliage or high water content, can absorb and scatter cosmic rays to some extent. An outdoor plant box, when strategically placed and filled with dense plants like shrubs or small trees, might offer partial shielding. However, the effectiveness depends on factors like plant density, species, and the box's size.

For optimal results, choose plants with high biomass, such as bamboo or ivy, and arrange them in multiple layers. While an outdoor plant box won’t replace professional shielding, it could complement other methods in a sustainable, eco-friendly way. Further research is needed to quantify its exact impact, but it’s an intriguing option for reducing muon exposure naturally.