Scleranthus uniflorus

Scleranthus uniflorus is not a moss, despite appearances. It is a perennial groundcover plant native to New Zealand, highly appreciated in Japanese or miniature gardens where it forms remarkable, very green mounds, even in winter. This relatively hardy ground cover is used outdoors, in morning sun or in light shade that remains bright, planted in humus-rich, slightly acidic, well-drained soil that stays moist. Under these conditions, it works wonders in Asian or contemporary-inspired settings, in moist rockeries, or to structure a small urban garden.

Scleranthus uniflorus belongs, like carnations, to the Caryophyllaceae family. It is a slow-growing perennial grass-like plant, averaging 15cm (6in) in height, capable of spreading over 60 to 80cm (24 to 32in) in 5 years. Over time, its vegetation takes on some relief, forming small domes that give it a beautiful mounding aspect, with a soft texture to the touch. The foliage is composed of countless small linear and pointed leaves, short and dense, of a tender green colour. They are tightly packed against each other. The flowering in May-June is insignificant, taking the form of tiny white-greenish to yellowish flowers. The foliage persists in winter if the temperatures do not drop too low. Otherwise, it dries up but will reappear in spring. Its hardiness does not exceed -10°C (14°F) at its most extreme, in well-drained soil. However, it is not an indoor plant.

Scleranthus uniflorus is perfect in Japanese, Asian-inspired, or contemporary gardens. It can be planted at the base of bushes, in the ground or in pots, or between large rocks in a moist rockery, near a small waterfall, or anywhere the soil remains moist and away from arid exposures. In a small urban garden, it can be planted between paving stones, for example. This little plant is particularly suitable for ornamenting ericaceous beds, to dress the base of rhododendrons, Japanese azaleas, and other camellias. It is a perfect plant for creative gardeners.