northern sea oats

Chasmanthium latifolium (northern sea oats) is a native grass that produces unique, large seedheads that can be left through winter to add interest to the garden.

The foliage changes color from a blue-green when it first emerges to a vivid green before fading to brown. C. latifolium reseeds easily and therefore can be aggressive if left unchecked. A larval host plant for the Northern Pearly-Eye butterfly.

Botanical Name Chasmanthium latifolium
Common Name northern sea oats
Family Poaceae
USDA Zone 3 thru 8
Light Requirement Full Sun to Part Shade
Season(s) of interest summer, fall, winter
Height and Spread 2-5ft x 1-2.5ft (60-150cm x 30-75cm)
Flower Color Green
Attracts Wildlife Provides Food for Birds, Hosts Caterpillars of Butterflies/Moths, Rarely Browsed by Mammalian Herbivores
Additional Information Native to Chicago Region.
Location in Lurie Garden Southwest Dark Plate


Average Flowering Time