Species Profile: Mexican Feather Grass

Common Name: Mexican Feather Grass (also known as Silky Thread Grass, Nassella Tenuissima)
Scientific Name: Nassella tenuissima (syn. Stipa tenuissima)

Location:
Native to Mexico, Texas, and parts of the southwestern United States. In Central Texas, it thrives in dry, rocky, and well-drained soils. Often planted in gardens, xeriscapes, and restoration landscapes for its ornamental, feathery texture.

Mating Habits:
A perennial bunchgrass that reproduces primarily through wind-dispersed seed. Its clumping growth habit also allows it to slowly spread vegetatively.

Seasonal Habits / Bloom Time:
Foliage emerges in spring as fine, hair-like green leaves. By late spring to summer (May–July), it produces airy, feathery seed heads that shimmer in the wind. In fall and winter, foliage turns golden tan, persisting into the dormant season.

Ecological Relevance:
Provides habitat structure and cover for insects and small wildlife. While not a major nectar or pollen source, its seeds are eaten by small birds, and its dense foliage supports insect life. Its deep roots help with erosion control on slopes and disturbed soils.

Interesting Facts:

• Extremely drought-tolerant and thrives in hot Texas summers.

• Known for its graceful, flowing appearance, moving like waves in the wind.

• Low-maintenance, often used as a replacement for invasive ornamental grasses.

• Considered short-lived but reseeds readily.

Wildlife Associations:
Attracts seed-eating birds, while its dense clumps provide habitat for insects and small creatures. Can be a nesting material source for birds.

Conservation Note:
Mexican Feather Grass is both ornamental and ecologically valuable in Central Texas landscapes. While not as pollinator-friendly as flowering natives, it provides structure and seed resources. Best used alongside native wildflowers and nectar plants to balance habitat needs.