To plant mnium, ensure moist, well-draining, slightly acidic to neutral soil rich in organic matter, in a shaded or partially shaded area, mimicking their natural woodland habitats. Begin by loosening the soil and integrating compost. Spread the mnium spores or place small clumps evenly, pressing gently into the soil. Water thoroughly after planting. Consistent moisture is crucial, so water regularly but avoid waterlogging. A shady spot prevents drying out, maintaining the humid conditions mnium prefers. Specific species within the genus may have variations in requirements; thus, researching individual needs ensures successful establishment.