Carex oshimensis EverColor® 'Fiwhite' EVEREST Japanese sedge

Carex

Sedges (Carex) form an enormous genus of evergreen and deciduous grasses united by a distinctive feature that gave them their botanical name and echoes in many languages: the edges of their leaves are usually sharp, like the cleanly cut sheets of office paper. There are more than 1500 species, and modern sources already speak of over 2000, occurring in almost every climate zone from hot tropics to arctic tundra. In the far north they are among the most important groups of plants capable of surviving in such harsh conditions. The first botanical descriptions appeared in the 18th century, when Carl Linnaeus (1707–1778) began to classify the vast diversity of sedges, but the real breakthrough came later with detailed studies of spikelet and utricle morphology, which allowed botanists to distinguish species with greater precision. The genus is extraordinarily variable: species differ in size, colour, leaf width, flowering and growth habit. Some form tight clumps, others spread and create dense groundcover. Most sedges, including those native to temperate climates, naturally grow in moist to wet habitats, which is somewhat paradoxical because many of them cope surprisingly well with long periods of drought as long as they are not planted in full sun.

Carex oshimensis, Japanese sedge, originates from the islands of Honshu and Shikoku, where it grows on lightly shaded slopes, in open woodlands and in stony, well drained soils. These habitats explain its unusual combination of evergreen foliage, resilience and the ability to maintain a compact shape even in winter. The species was described by the Japanese botanist Jisaburó Ohwi (1905–1977), whose meticulous work on the flora of Japan highlighted the remarkable ecological plasticity of sedges and their capacity to adapt to a wide range of conditions. It entered European horticulture only in the second half of the twentieth century, when garden designers recognised its fine yet firm habit and its year-round presence, qualities that many European sedges lacked.

Building on the natural elegance and reliability of Carex oshimensis, the Irish breeder Pat FitzGerald began, at the turn of 20th and 21st centuries, selecting plants that retained their colour and form even in conditions where other sedges lost compactness or faded. From this long-term selection emerged the EverColor® series, officially introduced in 2014 and first brought to wider attention in 2009 with the cultivar ‘Everest’, which demonstrated that variegation could remain stable throughout the year. FitzGerald selected plants with the firmest habit, the most consistent leaf pattern and the highest tolerance to cold and fluctuating light conditions, which led to cultivars capable of thriving from full sun to shade, in ordinary garden soil as well as in containers. The series quickly gained international recognition, confirmed by the gold medal awarded to ‘Everglow’ at Plantarium 2018, one of Europe’s most prestigious ornamental plant exhibitions. EverColor® has since become a showcase of modern breeding, combining year-round effect, minimal maintenance requirements and dependable colour in cultivars that are now among the most widely used evergreen grasses in European and overseas plantings.