Researchers developed eco-friendly building materials by growing mushroom mycelium (Ganoderma resinaceum) on waste residues from rose and lavender essential oil production. These waste biomasses, typically discarded or burned, were successfully converted into biocomposites with properties comparable to hempcrete and other sustainable materials. The resulting mycelium-based materials are completely natural, biodegradable, and possess antimicrobial and aromatic properties, offering a promising sustainable alternative to synthetic materials.