Cystopteris fragilis (syn. C. dickieana)


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This widespread little fern is of Scottish provenance where it is abundant and easily found in rock cracks and sundry centuries-old architectural features such as stone walls, stone bridges, stone follies and stone buildings that combine to make villages and gardens so damned picturesque especially when covered in ferns. The spores are covered by a bubble-like indusium which inspired the common name of Bladder Fern.


Plant Type

  • Fern

Mature Size


Hardiness Zones

  • Zone 4a (-30 °F)
  • Zone 4b (-25 °F)
  • Zone 5a (-20 °F)
  • Zone 5b (-15 °F)
  • Zone 6a (-10 °F)
  • Zone 6b (-5 °F)
  • Zone 7a (0 °F)
  • Zone 7b (5 °F)
  • Zone 8a (10 °F)
  • Zone 8b (15 °F)
  • Zone 9a (20 °F)
  • Zone 9b (25 °F)

Sun Exposure

  • Shade
  • Part Shade - Part Sun

Water Needs

  • Moist
  • Moderate

Bloom Time

  • Not applicable