Chasmanthium latifolium - Northern Sea Oats
Chasmanthium latifolium - Northern Sea Oats - Photo courtesy of Sean James Consulting & Design

Northern Sea Oats

Chasmanthium latifolium

  • AKA Uniola latifolia
  • Light green pendulous blades held on thin stems turn yellow in fall
  • Stems produce delicate pendulous seeds in summer, persisting into the winter
  • Dangling green seeds mature to a pinkish-bronze and can be used as cut or dried flowers
  • Bloom Time: August to September
  • Grass Type: Warm Season?



75-90 cm

30-60 cm

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Growing and Maintenance Tips:

Best grown in dappled shade, in moist conditions. Fruiting is better in full sun, leaves are darker in some shade. Sometimes our season is long enough to allow them to self-seed, thickening the clump. Seedlings are easily removed. Prune foliage in late winter.

Additional Notes about Northern Sea Oats:

Almost native to our area.

Warm Season Grasses: These grasses are much slower starting in the spring. They do not push new growth until temperatures warm in early to midsummer. They flower later in the summer or fall with most blooms remaining into the winter. Most warm season grasses tolerate heat, humidity and drought; some even thrive in these conditions.

This grass exhibits some warm-season and some cold-season characteristics.