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River Oats — Chasmanthium latifolium

River Oats

Chasmanthium latifolium

Poaceae · Grass

Known for its unique, flat, oat-like seed heads that shimmer in the breeze, River Oats adds texture and movement to the garden. It is highly adaptable, thriving in both sun and shade, making it a versatile choice.

  • · Can self-seed; deadhead if unwanted spread is a concern.
  • · Cut back in late winter or early spring to encourage fresh growth.
  • · Tolerates wet soils better than many other ornamental grasses.

At a glance

  • Growing zones: 3-9
  • Sun: Full sun to partial shade
  • Water: Moderate
  • Maintenance: Low
  • Type: Grass
  • Mature size: 2-3 ft tall · 1.5-2.5 ft wide
  • Bloom season: Summer to fall · Green to coppery-bronze (seed heads)
  • Pollinator friendly: Yes
  • Container suitable: Yes
  • Cold tolerance: Hardy to -40F
  • Heat tolerance: Excellent
  • Soil: Moist, well-drained
  • Growth rate: Moderate
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