Irish moss, also called Scotch moss, is a low growing ground cover. Irish moss is sturdy and can handle foot traffic when planted between stepping stones. The plant grows in clumps that reach 2 to 4 inches in height and produces small white flowers that blossom during the spring through early summer. Irish moss grows quickly and can become invasive in flower beds when not controlled.
Choose a planting location that has a sandy loam soil that drains well and receives full sunlight. Lightly work the soil to break it up and smooth the surface.
Plant Irish moss seeds in early spring or autumn by sowing them directly on the ground and lightly covering them with sand. Sow each seed approximately 10 centimeters apart or 20 centimeters if sowing the spreading variety.
Water the seeds lightly after sowing. Continue to water the plants once a week during the first year of growth so the soil remains moist. Water the plants more frequently during the hot summer months.
Apply a general purpose fertilizer after the plant has become established and has produced flowers. Fertilizing prior to flowering will produce green growth but inhibit blossom production.
Propagate Irish moss by collecting seeds that form on the plant after flowering or through cuttings taken during the summer months while the plant is actively growing.