North America Native Plant

Screwleaf Muhly

Botanical name: Muhlenbergia straminea

USDA symbol: MUST

Life cycle: perennial

Habit: grass

Native status: Native to the lower 48 states  

Synonyms: Muhlenbergia virescens auct. non (Kunth) Kunth (MUVI2)   

Screwleaf Muhly: A Drought-Tough Native Grass for Southwestern Gardens If you’re looking for a low-maintenance native grass that can handle the heat and drought of the American Southwest, screwleaf muhly might just be your new best friend. This unassuming perennial grass (Muhlenbergia straminea) may not have the flashiest name, but ...

Screwleaf Muhly: A Drought-Tough Native Grass for Southwestern Gardens

If you’re looking for a low-maintenance native grass that can handle the heat and drought of the American Southwest, screwleaf muhly might just be your new best friend. This unassuming perennial grass (Muhlenbergia straminea) may not have the flashiest name, but it packs a punch when it comes to resilience and natural beauty.

What Makes Screwleaf Muhly Special?

Screwleaf muhly is a true native of the southwestern United States, naturally occurring in Arizona and New Mexico. As a member of the grass family, this perennial brings that fine-textured, graceful movement to your garden that only grasses can provide. You might occasionally see it listed under the synonym Muhlenbergia virescens, but don’t let that confuse you – it’s the same wonderful plant.

What sets this grass apart is its incredible drought tolerance and ability to thrive in challenging conditions that would leave other plants gasping for water. Once established, screwleaf muhly is practically bulletproof.

Why Choose Screwleaf Muhly for Your Garden?

There are several compelling reasons to consider adding this native grass to your landscape:

  • Water-wise gardening: Perfect for xeriscaping and drought-tolerant landscapes
  • Native plant benefits: Supports local ecosystems and requires minimal inputs
  • Low maintenance: Once established, it practically takes care of itself
  • Wildlife value: Seeds provide food for birds and small wildlife
  • Natural movement: Adds graceful texture and movement to garden beds

Where Does Screwleaf Muhly Fit in Your Landscape?

This versatile grass works beautifully in several garden settings. It’s particularly at home in native plant gardens, where it can mingle with other southwestern natives. Screwleaf muhly also makes an excellent choice for naturalized areas where you want that wild, unmanicured look.

In xeriscape designs, this grass serves as a perfect textural element, providing soft contrast to more structural plants like agaves or cacti. It works well as an accent plant or can be planted in drifts for a more dramatic effect.

Growing Conditions and Care

The beauty of screwleaf muhly lies in its simplicity. This grass thrives in full sun and well-draining soil – two things the Southwest has in abundance. It’s hardy in USDA zones 7 through 10, making it suitable for most areas within its native range and similar climates.

Here’s what you need to know about growing screwleaf muhly successfully:

  • Sunlight: Full sun is best, though it can tolerate some light shade
  • Soil: Well-draining soil is essential – it won’t tolerate soggy conditions
  • Water: Drought tolerant once established; minimal supplemental watering needed
  • Maintenance: Very low maintenance; occasional cleanup of old growth

Planting and Establishment Tips

Getting screwleaf muhly off to a good start is straightforward. Plant it in spring or fall when temperatures are more moderate. While it’s drought tolerant once established, give it regular water during its first growing season to help it develop a strong root system.

Space plants according to their mature size, keeping in mind that grasses often look better when planted in odd-numbered groups. The fine texture of screwleaf muhly means it won’t overwhelm smaller companions, making it a great team player in mixed plantings.

Is Screwleaf Muhly Right for Your Garden?

If you garden in the Southwest and appreciate native plants that work with nature rather than against it, screwleaf muhly deserves serious consideration. It’s particularly valuable for gardeners dealing with water restrictions, poor soils, or challenging sites where other plants might struggle.

This grass won’t give you the showstopping blooms of a flowering perennial, but it offers something equally valuable: reliable, season-long interest with minimal fuss. In a world where gardening often feels complicated, screwleaf muhly is refreshingly simple – and sometimes simple is exactly what we need.

Screwleaf Muhly

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Commelinidae

Order

Cyperales

Family

Poaceae Barnhart - Grass family

Genus

Muhlenbergia Schreb. - muhly

Species

Muhlenbergia straminea Hitchc. - screwleaf muhly

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA