Helictotrichon sempervirens 'Sapphire' or 'Saphirsprudel' - Blue Oat Grass (photo credit: Growing Colors)

Ornamental Grasses

Helictotrichon sempervirens 'Sapphire'

Blue Oat Grass

Helictotrichon sempervirens, commonly called blue oat grass, is a clump-forming, cool season, ornamental grass which typically grows 2-3' tall (foliage clump to 2' and flower stem brings total height to 3') with a similar spread. Features very narrow, spiky, steel blue leaf blades which form a rounded, porcupine-like clump. Spikelets of bluish-brown flowers arranged in open, one-sided panicles arching at the tip appear on erect stems rising well above the foliage clump in June. Flower spikelets mature to a golden wheat color by fall.

'Sapphire' (or Saphirsprudel') differs from the species by having slightly wider leaf blades, better blue color, better disease resistance (especially to rust) and better tolerance for heat and humidity. 


Specimen for the border or rock garden. Mass for ground cover. Effective foundation plant as an accent or in conjunction with dwarf blue spruces or junipers. Blue foliage contrasts well with pink flowering perennials and many spring bulbs.

Blue Oat Grass Growing and Maintenance Tips:

A very upright, blue foliage, clumping grass that likes hot and dry conditions. A cool season grass.

Height:

24-36 in

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Spread:

18-24 in

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Hardiness Zone:

4 - 8

Characteristics & Attributes for Helictotrichon sempervirens 'Sapphire'

Exposure
Sun
Partial Shade
Soil Moisture Preference
Dry
Average
Critter Resistance
Deer Resistant
Season of Interest (Flowering)
Summer
Season of Interest (Foliage)
Spring
Summer
Fall
Attributes
Focal Point
Drought Tolerant
Great Foliage
Mass Planting
Specimen
Border or Bed
Foliage Color
Blue
Great Companion Plants for Helictotrichon sempervirens 'Sapphire'
Coneflower Coneflower (Echinacea purpurea 'PowWow Wild Berry')
Yarrow Yarrow (Achillea millefolium 'Saucy Seduction')
Garden Pinks Garden Pinks (Dianthus 'Rockin™ Red')
Tall Bearded Iris Tall Bearded Iris (Iris germanica 'City Lights')
Similar Plants to Helictotrichon sempervirens 'Sapphire'
Blue Fescue Blue Fescue (Festuca glauca 'Elijah Blue')
Little Bluestem Little Bluestem (Schizachyrium scoparium )
Blue Sedge Blue Sedge (Carex flacca 'Blue Zinger')