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Koeleria macrantha

Prairie junegrass

FIRST IMPRESSIONS:   Koeleria macrantha  is a clump forming tufted perennial bunch grass.  Leaves are medium green and erect.  Foliage is medium green, and flowers a light green, which fade to a wheat color.  This grass prospers in sunny sites with disturbed or poor infertile soils.

HABITAT & HARDINESS:  This pioneer species is common throughout much of the United States, Europe and Asia. It grows best in cool summer areas or it will go summer dormant.  Areas with high summer temps and humidity should be avoided.  

Excellent for restoration projects as it will self-seed readily.  For the same reason, not recommended for the formal landscape or clay or wet soil.  

Koeleria macrantha is indigenous to abandoned fields, early and mid-successional prairies, disturbed roadsides, railroad rights-of-ways, pastures, exhausted mined land, and barren waste areas.  

Hardy from USDA Zones 3 to 9.

Juglone tolerant, dry rocky soil tolerant and air pollution tolerant.  


Height:

1-2 ft

Spread:

1-2 ft

Spacing:

2-3 ft

USDA Hardiness Zone:

3-9

Bloom Color:

Green, Tan

Koeleria macrantha Characteristics

Attracts Wildlife

  • Songbirds

Exposure

  • Full Sun

Attributes

  • Naturalizing
  • East-Coast Native
  • Drought Tolerant
  • Dried Flower

Flowering Months

  • May
  • June

Foliage Color

  • Green

Grass Season

  • Cool Season Grass

Growth Rate

  • Fast

Juglans nigra Tolerance (Black Walnut)

  • Yes

Salt Tolerance

  • Medium

Season of Interest (Foliage)

  • Fall
  • Summer

Soil Moisture Preference

  • Dry

Plants that work well with Koeleria macrantha ''

Butterfly weed Butterfly weed (Asclepias tuberosa)
Tennessee coneflower Tennessee coneflower (Echinacea tennesseensis 'Rocky Top')
Hyssop leaved boneset Hyssop leaved boneset (Eupatorium hyssopifolium)
Black-eyed Susan Black-eyed Susan (Rudbeckia fulgida v. fulgida)
Sea shore goldenrod Sea shore goldenrod (Solidago sempervirens)
Upland ironweed Upland ironweed (Vernonia glauca)
New York ironweed New York ironweed (Vernonia noveborecensis)
Appalachian Mountain Mint Appalachian Mountain Mint (Pycnanthemum flexuosum)
small woodland sunflower small woodland sunflower (Helianthus microcephalus)

Substitutions for Koeleria macrantha

Broom sedge Broom sedge (Andropogon virginicus)
Switch grass Switch grass (Panicum virgatum)