Carex umbrosa

Carex umbrosa, also known as Shady Sedge or the many-rooted sedge (Carex polyrrhiza), possesses the simple elegance and robustness of wild plants. This modest-sized grass is widespread in cool undergrowth and forest edges. In the garden, it forms a dense trailing clump composed of very fine, vibrant green leaves. Its inconspicuous yet graceful inflorescences appear in spring among the foliage, composed of brown spikes. It is a hardy, low-growing perennial that is appreciated for its natural charm and its ability to cover and stabilise shaded areas of the garden. Plant it in moist, even clayey soil, in partial shade or full shade.

Carex umbrosa is a sedge native to central Europe, most commonly found in slightly shaded acidic clay soil in forested locations. This 'grass' belongs to the large Cyperaceae. It is a low-growing species with short rhizomes, forming a clump about 30cm (12in) tall and wide. Its narrow, linear leaves, which remain evergreen in winter, measure 2 to 4mm (1in) wide and approximately 45cm (18in) long. They have a rough texture, with tapered edges and drooping tips. From April to July, inflorescences appear just above the foliage, carried by slender culms measuring 40 to 50cm (16 to 20in) tall. Each inflorescence consists of a terminal male brown spike surmounting 2 or 3 distinct female spikes that turn green to blonde at maturity.

In partial shade, it forms a dense foliage bouquet that conceals the ground and discourages adventive plants. It can be paired with Anemone nemorosa or hostas, which tolerate the same growing conditions. It also provides a beautiful backdrop for spring-flowering bulbs such as narcissus, crocus, and botanical tulips. While not spectacular, this plant brings a sense of lightness to the lush foliage of rodgersias and the fronds of ferns, and pairs well with heucheras. Place it along the edges of perennial borders as well. For a wild and natural effect, plant it en masse in a contemporary or countryside garden, even in heavy clay soil.