Adiantum pedatum L.
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Adiantum pedatum, commonly known as five finger fern, American maidenhair, is a perennial.
Adiantum pedatum was described by Carl Linnaeus in 1753. The name is considered as validly published.
The perennials have a stemless growth and reach heights of 30 to 40 centimetres. The plants reach a width of 0.6 to 1 metres.
Adiantum pedatum is deciduous. The green, tripinnate leaves are basal. The leaflets are ovate and have dentate margins. The leaves are around 40 to 50 centimetres large. They turn an attractive dark red in autumn.
Flowers and Fruits
Adiantum pedatum flowers from June to September.
The perennials produce fruits in summer.
The plants form rhizomes.
Adiantum pedatum is native to the Northeast of the US.
The perennials prefer a half-shady situation on moist soil. The substrate should be sandy-loamy, sandy clay, loamy clay or peaty soil with a pH between 4 and 6. They tolerate temperatures down to -29Â°C (USDA zone 5). The plants are suited for the shores areas of and in natural standing bodies of water and natural streams.
Classification after Prof. Dr. Sieber
- open areas
- woods (soil usually rich in organic material)
Tolerance of special soil conditions
- medium: calcareous soil
Adiantum pedatum is considered excellent cultivar. The recommended planting distance is 45 centimetres, the perennials are best planted in groups of 3 to 5. Suited for rockeries and for mixed borders, as well as suited as cemetery plant, groundcover, cut flowers and as indoor plant.
Maintenance and Propagation
The plants need little to no maintenance if grown under suitable conditions.
Propagate by division.
Pests and Diseases
Scale insects that sit on the undersides of the leaves and excrete honeydew can be controlled with insecticide or biologically with parasitic wasps.
- Walter Erhardt, Erich GÃ¶tz, Nils BÃ¶deker, Siegmund Seybold: Der groÃe Zander. Eugen Ulmer KG, Stuttgart 2008, ISBN 978-3-8001-5406-7. (Ger.)
- Christoper Brickell (Editor-in-chief): RHS A-Z Encyclopedia of Garden Plants. Third edition. Dorling Kindersley, London 2003, ISBN 0-7513-3738-2.