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ornamental grass

Prairie June Grass

Koeleria pyramidata

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Prairie June Grass (Koeleria pyramidata) at Eagle Lake Nurseries

Prairie June Grass flowers

Prairie June Grass flowers

(Photo courtesy of NetPS Plant Finder)

Height:  9 inches

Spread:  9 inches

Sunlight:  full sun  partial shade 

Hardiness Zone:  3a

Other Names:  Koeleria cristata, Koleria macrantha


This lovely grass is grown for its attractive foliage, adds interest to the otherwise barren landscape under evergreens or enhancing a focal point in a rock garden, fine choice for a difficult location

Ornamental Features

Prairie June Grass features airy plumes of white flowers rising above the foliage in early summer. Its grassy leaves remain light green in colour throughout the season.

Landscape Attributes

Prairie June Grass is a dense herbaceous perennial grass with an upright spreading habit of growth. It brings an extremely fine and delicate texture to the garden composition and should be used to full effect.

This is a relatively low maintenance plant, and is best cut back to the ground in late winter before active growth resumes. It has no significant negative characteristics.

Prairie June Grass is recommended for the following landscape applications;

  • Mass Planting
  • Border Edging
  • General Garden Use
  • Groundcover
  • Naturalizing And Woodland Gardens
  • Container Planting
  • Bog Gardens

Planting & Growing

Prairie June Grass will grow to be about 9 inches tall at maturity, with a spread of 9 inches. It grows at a fast rate, and under ideal conditions can be expected to live for approximately 10 years. As an herbaceous perennial, this plant will usually die back to the crown each winter, and will regrow from the base each spring. Be careful not to disturb the crown in late winter when it may not be readily seen!

This plant does best in full sun to partial shade. It is quite adaptable, prefering to grow in average to wet conditions, and will even tolerate some standing water. It is not particular as to soil type or pH. It is highly tolerant of urban pollution and will even thrive in inner city environments. This species is native to parts of North America.

Prairie June Grass is a fine choice for the garden, but it is also a good selection for planting in outdoor pots and containers. It is often used as a 'filler' in the 'spiller-thriller-filler' container combination, providing a mass of flowers against which the larger thriller plants stand out. Note that when growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden. Be aware that in our climate, most plants cannot be expected to survive the winter if left in containers outdoors, and this plant is no exception. Contact our experts for more information on how to protect it over the winter months.

Hardiness Zone Plant Height Minimum Sunlight
Massing  Edging  Garden  Groundcover  Naturalizing  Container  Bog 
Flowers  Texture  Plant Form 
Ornamental Features