Tuber Oat Grass, Bulbous Oat Grass

Tuber Oat Grass, Bulbous Oat Grass

Arrhenatherum elatius bulbosum 'Variegatum'

This ornamental grass forms a mounding clump is valued for its texture, movement, and four-season presence in the mixed border or mass planting.

  • Bold foliage provides strong textural contrast in the mixed border from spring through winter.
  • Flower heads add a secondary layer of ornament through summer and autumn.
  • Leave stems standing through winter for wildlife value and structural interest; cut back hard to 10–15 cm in early spring.
  • Best in partial shade to full shade with moist, well-drained soil.
Size
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Plant Characteristics

Sunlight
Partial shade, Shade
Soil Moisture
Moist, Average, Well-drained
Hardiness Zone
4 – 4
Mature Height (meters)
0.3 – 0.4
Mature Spread (meters)
0.3 – 0.4
Growth Rate
Medium
Foliage Colour
Green
Bloom Time
Summer
Habit
Mounding
Deer Resistant
✓
Rabbit Resistant
✓
Landscape Uses
Border
Growing & Maintenance Tips
Grows best in a moist, well-drained soil, in partial to full shade and tolerates humidity. It is recommended to prune foliage almost to ground level in midsummer to allow for new growth in the fall months.
Notes
Cool Season Grasses: These grasses do the majority of their growing in early spring and start again when temperatures start to cool in the fall. During the warmer summer months they stop growing and some will even go dormant. Cool season grasses will flower in the spring or early summer. Most cool season grasses grow best in a consistently moist soil.

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