Live Fern Moss (Thuidium delicatulum), also known as Delicate Fern Moss, is prized for its soft, finely branched, fern-like texture that brings a natural woodland aesthetic to terrariums and vivariums. This fast-growing, mat-forming moss creeps across substrates while branching upward in a loosely interwoven pattern, creating the appearance of miniature ferns. Bright to yellow-green when hydrated, it may shift to medium or olive green when dry, quickly reviving with moisture. Its feather-like leaves form a dense, textured groundcover that enhances humidity retention, soil stability, and microhabitat complexity. Fern Moss thrives in humid, shaded, closed environments, making it an excellent choice for tropical or temperate terrariums, amphibian habitats, or forest-floor simulations. Perfect for soft groundcover, background layering, or accenting wood and stone, this moss adds both beauty and ecological function. Shipped live and hydrated, it is ready for immediate use in your enclosure.