Botanical Name: Festuca idahoensis 'Siskiyou Blue'
Common Name: Siskiyou Blue Fescue  
Plant photo of: Festuca idahoensis 'Siskiyou Blue'
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Water Saving Tip:

Group plants in your garden according to their water needs (hydrozone).

  • Anatomy

  • Culture

  • Design

Plant Type

Broadleaf Evergreen, Ground cover, Perennial, Grass


Height Range



Flower Color

Green, White


Flower Season



Leaf Color

Blue Green


Bark Color



Fruit Color



Fruit Season



Full, Half





Growth Rate



Soil Type

Sandy, Clay, Loam, Rocky, Unparticular


Soil Condition

Average, Rich, Poor, Well-drained, Dry


Soil pH

Neutral, Basic


Adverse Factors


Design Styles

English Cottage, Formal, Japanese, Meadow, Mediterranean, Ranch, Seascape, Spanish, Native Garden, Woodland


Accenting Features

Unusual Foliage


Seasonal Interest

Winter, Summer, Fall


Location Uses

Perennial Border, Foundation, Parking Strip, Raised Planter, Walkways, With Rocks


Special Uses

Erosion Control, Mass Planting, Lawn Alternative, Small Spaces


Attracts Wildlife

Birds, Wildlife

Information by: Stephanie Duer
Photographer: GardenSoft
  • Description

  • Notes

This selection of the native Idaho Fescue is notable for its enticing spruce-blue foliage. The thin leaves are much longer than the more familiar Festuca glauca, giving 'Siskiyou Blue' a softer, more graceful look. It blooms in the late spring producing tall, straight tan flower spikes typical of Festuca grass. 12 to 16 inches tall and 12 to 18 wide. Well suited to perennial borders, parkstrips, or meadow-lawns. Evergreen.
Grow in full to part sun in well drained soil. Best coloring in full sun. Zones 5-9. Generally doesn't require cutting back. Fescues resent wet soils so take care to not over-water; when planting, set the plant so the crown is slightly above soil grade to give it a good start (see Guides).