Irish Moss (Sagina subulata) isn't a moss at all, but rather a charming evergreen perennial that forms dense, carpet-like mats of tiny emerald green foliage. Each cushion is studded with small white flowers like miniature stars throughout spring and summer. Despite its common name, this plant is actually more closely related to carnations than to true mosses.

Growing just 1-2 inches (2.5-5 cm) tall and spreading 12-18 inches (30-45 cm), it creates perfect living carpets between stepping stones, in rock gardens, or as a lawn substitute in small areas. The fine, needle-like leaves form tight mounds that can withstand light foot traffic and maintain their crisp green color year-round in most climates.

Cultivation: Prefers well-draining soil in full sun to part shade. While drought-tolerant once established, regular moisture produces the lushest growth. Can be divided in spring or fall to create new plants. Seedlings emerge in 14-21 days but are very tiny - patience required.

For best results, plant in areas where its diminutive stature can be appreciated - between pavers, in rock gardens, or as a groundcover in contained areas. Though slow to establish from seed, its dense growth eventually crowds out most weeds while maintaining a neat appearance.