Nassella tenuissima, Mexican Feather Grass

Nassella tenuissima, commonly known as Mexican Feather Grass or Angel Hair Grass, is a popular ornamental grass known for its delicate, graceful appearance. Here’s a detailed overview of Mexican Feather Grass, including its characteristics, uses, and care:

Characteristics

1. Appearance:

   • Height: Typically grows to 18-24 inches (45-60 cm) in height, though it can occasionally reach up to 36 inches (90 cm) in ideal conditions.
   • Leaves: Features fine, thread-like leaves that give it a feathery, airy look. The foliage is green and can turn a golden hue in the fall.
   • Flowers: Produces airy, wispy flower panicles that resemble feathers. These are often tan or golden and persist through winter, adding winter interest.

2. Growth:

   • Growth Habit: Forms a loose, clumping growth habit. It has a flowing, graceful appearance that adds movement to gardens.
   • Soil: Prefers well-drained soil but is adaptable to various soil types, including poor soils.

Uses

1. Ornamental Landscaping:

   • Garden Design: Mexican Feather Grass is often used in garden beds, borders, and as a focal point in ornamental grass gardens. Its fine texture contrasts well with other plants and creates a soft, naturalistic look.
   • Ground Cover: Can be used as a ground cover in dry, sunny areas.

2. Drought-Tolerant Gardens:

   • Xeriscaping: Suitable for drought-tolerant or low-water gardens due to its ability to withstand dry conditions once established.

3. Winter Interest:

   • Seasonal Appeal: The flower heads and seed heads provide visual interest and texture in winter landscapes.

Planting and Care

1. Planting:

   • Timing: Best planted in spring or early fall when temperatures are moderate.
   • Spacing: Space plants about 12-18 inches (30-45 cm) apart to allow for their clumping growth habit.

2. Light Requirements:

   • Sun: Thrives in full sun but can tolerate light shade. Full sun exposure promotes the best growth and flowering.

3. Watering:

   • Initial Watering: Regular watering is needed until the plant is established.
   • Ongoing Care: Once established, it is drought-tolerant and requires minimal watering. Avoid overwatering, as this can lead to root rot.

4. Soil:

   • Drainage: Prefers well-drained soil. It is adaptable but does not thrive in soggy conditions.
   • Amendments: Incorporating organic matter can improve soil structure and drainage.

5. Fertilizing:

   • Feeding: Typically does not require frequent fertilization. A light application of a balanced fertilizer in spring can promote healthy growth.

6. Pruning:

   • Cutting Back: In late winter or early spring, cut back old foliage to encourage new growth. This helps maintain the plant's appearance and health.

7. Pest and Disease Management:

   • Monitoring: Generally pest and disease-resistant. However, keep an eye out for any signs of fungal diseases or pests.
   • Control: Treat any issues promptly using appropriate methods.

Environmental Considerations

• Invasiveness: In some regions, particularly in warmer climates, Mexican Feather Grass can become invasive. It is important to monitor its spread and manage it as needed to prevent it from outcompeting native plants.

Summary

Mexican Feather Grass (Nassella tenuissima) is a versatile and attractive ornamental grass known for its delicate, feathery texture and graceful appearance. It is well-suited for drought-tolerant gardens and provides seasonal interest with its unique flower heads and golden seed heads. With minimal care, it adds beauty and movement to landscape designs.