Isolepis cernua

fiber optic plant (syn Scirpus cernuus )

Eventual height & spread

Isolepis cernua

fiber optic plant (syn Scirpus cernuus )

  • 1 litre aquatic pot
  • £14.99
  • In stock (shipped within 2-3 working days)
  • 3 × 9cm pots
  • £27.99 £9.33 each
  • available to order from summer
  • 3 × 1 litre aquatic pots
  • £39.99 £13.33 each
  • available to order from summer
  • 2 litre aquatic pot
  • £29.99
  • available to order from summer
  • 3 litre aquatic pot
  • £34.99
  • available to order from summer
Delivery options
  • Standard £5.99
  • Named Day £10.99
  • Position: full sun or partial shade
  • Soil: moist to wet, humus-rich soil or aquatic compost
  • Depth of water: 0-8cm (0-3in)
  • Rate of growth: average
  • Flowering period: June to August
  • Hardiness: fully hardy


This wonderful foliage plant creates a fibre-optic effect, particularly when its slender tips are topped with small silvery white flower heads. It's primarily grown as an architectural specimen around the margins of a pond, where its submerged shoots can also help to oxygenate the water, but it's also excellent in a bog garden. It could even be kept in a pot - provided you make sure it's kept really well watered.


  • Garden care:
    Thriving in consistently moist soils,Isolepis cernua is mainly grown as a marginal aquatic plant. Grow in full sun or light shade as a marginal pond plant in 2–8?cm (0.75-3in) of water, in damp or wet soil in a bog garden, or in a very well-watered container. In autumn, tidy the plant, but avoid cutting back the foliage completely.
  • Goes well with