SafePlants

Variegated Japanese Sedge: A Comprehensive Overview

The Variegated Japanese Sedge encompasses several Carex species and cultivars, offering a variety of ornamental options for gardens and landscapes. These grass-like plants are prized for their elegant foliage and adaptability to various growing conditions.

Considerations for Pets

• Sedges have grass-like leaves which could be tempting for pets to chew on.

Scientific Name and Common Names

• Scientific Names: Carex morrowii, Carex oshimensis, Carex hachijoensis, Carex kobomugi, Carex dolichostachya
• Common Names: Variegated Japanese Sedge, Japanese Sedge, Japanese Sedge Grass, Silver Variegated Japanese Sedge, White Variegated Japanese Sedge, Sedge Grass, Asiatic sand sedge, Morrow's Sedge

Taxonomy and Nomenclature

• Family: Cyperaceae (Sedge family)
• Examples of Cultivars:
  • Carex morrowii 'Aurea-variegata'
  • Carex oshimensis 'Evergold'
  • Carex morrowii 'Ice Dance'
  • Carex morrowii 'Silver Sceptre'
  • Carex dolichostachya 'Kaga Nishiki'
  • Carex oshimensis 'Everest'
• Synonyms/Alternative Names: The text suggests some overlap in the use of names, for instance, Carex hachijoensis is sometimes used for Carex oshimensis 'Evergold'.

Distribution and Habitat

• The species Carex kobomugi is native to East Asia.
• It has been introduced on sandy beaches in Massachusetts and Rhode Island.
• Generally, Japanese sedges prefer moist, rich soil.

Ecological Role

• Carex Spark Plug' can serve as a substitute for the invasive ribbon grass.
• Carex kobomugi is sometimes selected for in invasive species contexts.

Morphological Characteristics and Growth Habits

• Japanese sedges are grass-like plants, often forming low, cascading clumps or tufted mounds.
• They can be clumping or creeping in habit.
• Leaves can be dark green, green with white or silver margins, or creamy yellow variegated.
• 'Evergold' typically forms a low, tufted mound.
• 'Ice Dance' spreads slowly.
• 'Silver Sceptre' has narrow leaves (1/4") with white margins.
• The creeping Japanese sedge grows 20 to 30 cm tall and spreads 30 to 45 cm.
• Height typically around 12 inches (30cm) for several varieties.
• Nodding brown flower spikes may appear in summer.

Cultivation

• USDA Zones: Generally adaptable to zones 5-9.
• They thrive in moist, rich loam in partial shade.
• Some varieties tolerate full shade, and even full sun in cooler areas.
• In late winter, Carex morrowii (Japanese Sedge Grass) should be cut to the ground before new growth starts.