perennial

Interrupted Fern

Osmunda claytoniana

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Interrupted Fern (Osmunda claytoniana) at Knupper Nursery

Interrupted Fern foliage

Interrupted Fern foliage

(Photo courtesy of NetPS Plant Finder)

Height:  4 feet

Spacing:  3 feet

Sunlight:  full sun  partial shade  full shade 

Hardiness Zone:  3

Ornamental Features

Interrupted Fern features bold spikes of brown flowers rising above the foliage in mid summer. Its enormous oval bipinnately compound leaves are lime green in color. The foliage often turns tan in fall. The fruit is not ornamentally significant.

Landscape Attributes

Interrupted Fern is an herbaceous perennial with a shapely form and gracefully arching foliage. Its relatively fine texture sets it apart from other garden plants with less refined foliage.

This is a high maintenance plant that will require regular care and upkeep, and is best cleaned up in early spring before it resumes active growth for the season. Gardeners should be aware of the following characteristic(s) that may warrant special consideration;

  • Suckering

Interrupted Fern is recommended for the following landscape applications;

  • Accent
  • Groundcover
  • Naturalizing And Woodland Gardens
  • Bog Gardens

Planting & Growing

Interrupted Fern will grow to be about 4 feet tall at maturity, with a spread of 4 feet. When grown in masses or used as a bedding plant, individual plants should be spaced approximately 3 feet apart. It grows at a fast rate, and under ideal conditions can be expected to live for approximately 15 years.

This plant performs well in both full sun and full shade. It prefers to grow in moist to wet soil, and will even tolerate some standing water. It is not particular as to soil type or pH. It is somewhat tolerant of urban pollution. Consider applying a thick mulch around the root zone over the growing season to conserve soil moisture. This species is native to parts of North America. It can be propagated by division.

 
 
Hardiness Zone Plant Height Minimum Sunlight
Characteristics
Accent  Groundcover  Naturalizing  Bog 
Applications
Flowers  Texture  Plant Form 
Ornamental Features

Knupper Nursery's Plant Finder is intended to be used for informational purposes only. It does not reflect what is currently in stock at Knupper's. We do not sell plants over the internet or ship plants outside of our local delivery area. Please call us at 847.359.1080 for plant availability.