Although we have found no reports of toxicity for this species, a number of ferns contain carcinogens so some caution is advisable
Many ferns also contain thiaminase, an enzyme that robs the body of its vitamin B complex. In small quantities this enzyme will do no harm to people eating an adequate diet that is rich in vitamin B, though large quantities can cause severe health problems. The enzyme is destroyed by heat or thorough drying, so cooking the plant will remove the thiaminase
Root. An emergency food, it is only used when all else fails
Plants can be grown as a ground cover when planted out about 15cm apart each way
There are no material uses listed for Cystopteris fragilis.
A decoction of the roots has been used as an anthelmintic enema
A cold compound infusion of the plant has been used both internally and externally as a treatment for injury
Spores - best sown as soon as ripe on the surface of a humus-rich sterilized soil. Keep the compost moist, preferably by putting a plastic bag over the pot. Germinates in 1 - 3 months at 20°c
.Pot on small clumps of plantlets as soon as they are large enough to handle and keep humid until they are well established. Do not plant outside until the ferns are at least 2 years old.
Division in spring.
Practical Plants is currently lacking information on propagation instructions of Cystopteris fragilis. Help us fill in the blanks! Edit this page to add your knowledge.
Prefers a shady position in a moist but well-drained soil, succeeding in most soil types
. Plants can tolerate up to 4 hours direct sun per day
. Prefers a pH between 6.5 and 7, but tolerates a range from 5.5 to 7.5
. Plants do especially well when grown in a shaded position on old mortared walls
Members of this genus are rarely if ever troubled by browsing deer.
Plants die back early in dry seasons.
A very ornamental plant
Problems, pests & diseases
Associations & Interactions
There are no interactions listed for Cystopteris fragilis. Do you know of an interaction that should be listed here? edit this page to add it.
Polycultures & Guilds
There are no polycultures listed which include Cystopteris fragilis.
This table shows all the data stored for this plant.
Material uses & Functions
Native Climate Zones
Adapted Climate Zones
Native Geographical Range
Root Zone Tendancy
? 1.01.11.21.31.41.5 Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press ISBN 0-333-47494-5 (1992-00-00)
? 2.02.12.2 Schofield. J. J. Discovering Wild Plants - Alaska, W. Canada and the Northwest. ()
? 3.03.1 Thomas. G. S. Plants for Ground Cover J. M. Dent & Sons ISBN 0-460-12609-1 (1990-00-00)
? 4.04.1 Chopra. R. N., Nayar. S. L. and Chopra. I. C. Glossary of Indian Medicinal Plants (Including the Supplement). Council of Scientific and Industrial Research, New Delhi. (1986-00-00)
? 5.05.1 Moerman. D. Native American Ethnobotany Timber Press. Oregon. ISBN 0-88192-453-9 (1998-00-00)
? Bird. R. (Editor) Growing from Seed. Volume 4. Thompson and Morgan. (1990-00-00)
? Grey-Wilson. C. & Matthews. V. Gardening on Walls Collins ISBN 0-00-219220-0 (1983-00-00)
? Thomas. G. S. Perennial Garden Plants J. M. Dent & Sons, London. ISBN 0 460 86048 8 (1990-00-00)
? F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press (1951-00-00)
? Clapham, Tootin and Warburg. Flora of the British Isles. Cambridge University Press (1962-00-00)
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