Stipa tenuissima

Features and care

Stipa tenuissima, now identified as Nassella tenuissima and known as Mexican feather grass, is a perennial grass with a fine clump and light movement. Its texture has led to uses in rockeries, borders, containers and dry-garden compositions. It is described for its ornamental interest, without being put forward as a general recommendation for new plantings.

It forms dense tussocks of very narrow, flexible leaves, green to silvery-grey, turning straw-coloured with cold. In summer, fine, silky, pale panicles appear, which can persist into autumn and produce abundant seed. The overall effect is airy and responds readily to wind.

It tolerates full sun or part shade and needs dry-to-cool, well-drained soil. During establishment and drought it needs supplemental watering, letting it dry out partially between applications. It reaches 0.4 to 0.8 m and falls within USDA zones 6–10. It tolerates dry spells once established and shows low tolerance to persistent ambient humidity. Winter temperatures can change the foliage colour without necessarily killing the clump.

At Ornacom we cultivate each specimen directly, guaranteeing a balanced size and abundant flowering from the first years of planting.

Extended species profile

Verified cultivation data, designed so any visitor can see at a glance whether the plant suits their climate and garden.

Cultivation

Exposure

Full sun or part shade

Watering

ORN-RIEGO 2/5 · low — supplemental watering during establishment and drought; let dry out partially

Soil / moisture

Dry to cool; well drained

Flowering

Summer and autumn

Climate

USDA hardiness

Zones 6 – 10

Compatible climates

BSk, Csa, Csb, Cfa dry

Humid climate tolerance

ORN-HUM 2/5 · low

Maintenance

Growth

ORN-ALT 1/5 · 0.4-0.8 m · fast growth

Pests

ORN-PLAGA 2/5 · low — occasional aphids/mites and rust or leaf spots under persistent humidity

Fertilising

ORN-ABONO 3/5 · medium — balanced application in spring and, if growth continues, a light second application

  • Warning

Invasive and regulated in several countries. Avoid planting near natural areas.

Extended species profile

Verified cultivation data, designed so any visitor can see at a glance whether the plant suits their climate and garden.

Cultivation

Exposure

Full sun or part shade

Watering

ORN-RIEGO 2/5 · low — supplemental watering during establishment and drought; let dry out partially

Soil / moisture

Dry to cool; well drained

Flowering

Summer and autumn

Climate

USDA hardiness

Zones 6 – 10

Compatible climates

BSk, Csa, Csb, Cfa dry

Humid climate tolerance

ORN-HUM 2/5 · low

Maintenance

Growth

ORN-ALT 1/5 · 0.4-0.8 m · fast growth

Pests

ORN-PLAGA 2/5 · low — occasional aphids/mites and rust or leaf spots under persistent humidity

Fertilising

ORN-ABONO 3/5 · medium — balanced application in spring and, if growth continues, a light second application

  • Warning

Invasive and regulated in several countries. Avoid planting near natural areas.

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