Blechnum fluviatile

Blechnum fluviatile

Kiwikiwi, star fern

  • Botanical name: Blechnum fluviatile
  • Common name: Kiwikiwi, star fern
  • Family: Blechnaceae
  • Plant Type: Perennial, Evergreen
Foliage colour:


The kiwikiwi or star fern, Blechnum fluviatile, is an evergreen fern native to New Zealand and Tasmania, where it can be found growing the the damp, moist areas near water.


This species has narrow, deep green fronds and is the perfect partner for plants that enjoy similar growing conditions, like candelabra primulas. It’s not fully hardy, so will require winter protection in colder areas.


For best results, grow Blechnum fluviatile in moist, well-drained, humus-rich soil in partial to full shade. Provide with shelter from cold, drying winds. Mulch around clumps each year with a generous amount of home-made compost or leaf mould.

How to grow Blechnum fluviatile

  • Plant size

    50cm height

    100cm spread

  • Aspect

    North facing, east facing

  • Position in border


  • Sun exposure: Dappled shade, full shade, partial shade
  • Shade type: Damp
  • Hardiness: Frost hardy
  • Soil type: Acidic / boggy / clay / heavy / moist

Plant calendar

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Do not Plant in January

Do not Plant in February

Do not Plant in March

Do Plant in April

Do Plant in May

Do Plant in June

Do not Plant in July

Do not Plant in August

Do not Plant in September

Do not Plant in October

Do not Plant in November

Do not Plant in December

Blechnum fluviatile and wildlife

Blechnum fluviatile has no particular known value to wildlife in the UK.

Is Blechnum fluviatile poisonous?

Blechnum fluviatile has no toxic effects reported.

No reported toxicity to:

No reported toxicity to Birds

No reported toxicity to Cats

No reported toxicity to Dogs

No reported toxicity to Horses

No reported toxicity to Livestock

No reported toxicity to People