Muhlenbergia rigens
Deer Grass
Description
Origin and Adaptability:
Muhlenbergia rigens, commonly known as deergrass, is a warm-season perennial bunchgrass native to the Southwestern United States and parts of Mexico. Thriving in sandy or well-drained soils below 7,000 feet (2,100 m) in elevation, this resilient plant is perfectly adapted to arid climates and is ideal for xeriscaped gardens, desert landscapes, and water-wise designs.
Architectural Form and Foliage:
Muhlenbergia rigens presents an elegant architectural form with its tufted, fountain-like clumps of fine-textured, arching foliage. Growing up to 3 to 6 feet in height and width, this grass adds movement and texture to the landscape, swaying gracefully in the breeze. During the flowering season, delicate, feathery panicles emerge, creating a soft, ethereal effect.
Floral Display and Growth Speed:
In late summer to fall, Muhlenbergia rigens produces airy, purple-tinged flower spikes that rise above the foliage, attracting a variety of pollinators, including butterflies and native bees. The plant's growth rate is moderate, gradually forming dense clumps over time, providing erosion control and habitat for wildlife.
Light and Water Requirements:
Thriving in full sun to partial shade, Muhlenbergia rigens requires at least six hours of sunlight per day for optimal growth and flowering. Once established, it exhibits excellent drought tolerance, requiring minimal supplemental watering. Deep, infrequent watering during periods of extended drought can promote healthy root development and enhance overall vigor.
Wildlife and Pollinators:
The feathery flower spikes of Muhlenbergia rigens provide an important food source for pollinators and seed-eating birds, supporting biodiversity in the garden. Additionally, the dense foliage offers shelter and nesting sites for small mammals and ground-dwelling birds, further enhancing the ecological value of this grass.
Cultural Significance and Edibility:
While not typically used for food, Muhlenbergia rigens has edible seeds that are nutritious and can be ground into a powder and consumed as a mush or meal. The plant holds cultural significance for Indigenous peoples of the Southwest, particularly in the central and southern regions of California. Historically, various parts of the plant, particularly the long stems of the inflorescence, have been used for basketry and weaving. This showcases the plant's versatility and importance in traditional crafts.
Challenges and Considerations:
Muhlenbergia rigens is relatively low-maintenance, requiring minimal pruning to remove spent flower spikes and maintain its attractive form. However, it may self-seed in favorable conditions, so monitoring its spread is recommended, especially in more cultivated landscapes.
Integration into Landscape Designs:
With its graceful form, attractive flowers, and ecological value, Muhlenbergia rigens is a versatile addition to a variety of landscape designs. Landscape architects and designers can use it as a focal point in native plant gardens, as a natural screen or border, or as part of erosion control and habitat restoration projects. Its adaptability and resilience make it an excellent choice for creating sustainable and biodiverse outdoor spaces.
USDA Zone Range
6 to 11
Mature Height
5 feet
Flower Color
Tan to creme-colored, fading to pale yellow near end of the season
Native Region
Southwestern US and northern Mexico
Variety
Grass
Soil Type
well-draining, sandy, rocky, clay, and loam
Planting Guidelines
Plant in spring, after the last frost, or in the fall, one month before the first frost for best success, be sure to water consistently until the grass establishes.
Maintenance
Periodic burning or division of the plant is beneficial, otherwise low maintenance.
Elevation Range
to 7000 feet
Mature Width
5 feet
Plant Type
Grass
Growth Habit
Very dense
Wildlife and Pollinators
Butterflies, bees, deer, horses, and cattle
Sunlight Requirements
Full Sun
Water Requirements
Moderate Water
Pruning
Cut grass back to 3 to 4 inches above the crown late winter, or early spring.