Sagina Subulata Qt

Latin Name: Sagina subulata

Common Name: Irish Moss / Pearlwort

Zones: 4–8 (sometimes listed 3–9)

Height & Spread: 1–2 inches tall, spreading 12–18 inches wide (spreads to form an indefinite mat)

Descriptive Features: A low, moss-like groundcover — despite its common name not a true moss but a member of the carnation family — prized for its ultra-fine, needle-like, bright green foliage that forms an incredibly dense, tight, spongy-textured cushion. Tolerates light foot traffic well, making it a favorite for softening the joints between stepping stones and pavers or filling in as a small-scale lawn alternative. In late spring to early summer, tiny, star-shaped white flowers stud the mat in a light, delicate display, adding subtle seasonal interest above the fine texture of the foliage. Thrives in consistently moist, well-drained soil and can struggle or brown out in hot, dry conditions or intense summer heat and humidity, performing best in cooler climates or with some afternoon shade in warmer regions. Deer-resistant and low-maintenance when given adequate moisture, needing only occasional light trimming to maintain a tidy appearance. An excellent choice for filling between pavers and stepping stones, edging, rock gardens, or as a soft, cushiony small-scale lawn substitute in full sun to part shade.