Non-native Plants

Hairy Wallaby Grass

Rytidosperma pilosum

USDA symbol: RYPI

perennial grass

Hawaii: non-native, naturalized
Lower 48 states: non-native, naturalized

If you’re looking for a low-maintenance perennial grass that can handle tough conditions, hairy wallaby grass (Rytidosperma pilosum) might have caught your attention. This Australian native has found its way into gardens across California, Hawaii, and Oregon, bringing a bit of Down Under charm to American landscapes. Hairy wallaby grass ...

Hairy Wallaby Grass: An Australian Import for Your Garden

If you’re looking for a low-maintenance perennial grass that can handle tough conditions, hairy wallaby grass (Rytidosperma pilosum) might have caught your attention. This Australian native has found its way into gardens across California, Hawaii, and Oregon, bringing a bit of Down Under charm to American landscapes.

What is Hairy Wallaby Grass?

Hairy wallaby grass is a perennial tufted grass that forms neat clumps of fine-textured foliage. Despite its somewhat amusing name, this grass gets its hairy designation from the fuzzy appearance of its leaves and seed heads. Originally known by botanists as Danthonia pilosa, this drought-tolerant grass has adapted well to Mediterranean-style climates.

Where Does It Grow?

While hairy wallaby grass calls southeastern Australia home, it has established populations in several U.S. states. You’ll find it growing in California, Hawaii, and Oregon, where it reproduces naturally without human assistance.

  • Species observed
  • No observations

Garden Appeal and Uses

This grass brings several appealing qualities to the garden:

  • Forms attractive, neat tufts that work well as ground cover
  • Produces delicate, airy seed heads that add texture and movement
  • Requires minimal water once established
  • Handles poor soils better than many ornamental grasses
  • Useful for erosion control on slopes

Growing Conditions

Hairy wallaby grass thrives in USDA hardiness zones 8-10 and prefers:

  • Full sun to partial shade
  • Well-draining soils (clay, sandy, or rocky)
  • Minimal supplemental watering after establishment
  • Mediterranean or drought-tolerant garden settings

Planting and Care Tips

This grass is refreshingly low-maintenance:

  • Plant in spring or fall for best establishment
  • Water regularly during the first growing season
  • Once established, it can survive on natural rainfall in most climates
  • May self-seed in favorable conditions
  • Rarely needs fertilizing or special care

Should You Plant It?

While hairy wallaby grass can be a useful addition to drought-tolerant landscapes, it’s worth considering that this is a non-native species. If you’re passionate about supporting local ecosystems, you might want to explore native grass alternatives first.

Some excellent native grass options to consider include:

  • Buffalo grass (Bouteloua dactyloides) for prairie regions
  • Blue grama (Bouteloua gracilis) for western areas
  • Little bluestem (Schizachyrium scoparium) for diverse conditions
  • California fescue (Festuca californica) for Pacific Coast gardens

The Bottom Line

Hairy wallaby grass can be a practical choice for gardeners seeking a drought-tolerant, low-maintenance grass for naturalistic plantings or erosion control. However, before adding any non-native plant to your landscape, consider whether a native alternative might better serve both your garden goals and local wildlife. When in doubt, consult with local native plant societies or extension offices for the best grass recommendations for your specific region.

Rytidosperma pilosum is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Rytidosperma pilosum is also known as:

Danthonia pilosa | USDA symbol: DAPI

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Monocot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Liliopsida - Monocotyledons
Subclass: Commelinidae
Order: Cyperales
Family: Poaceae Barnhart - Grass family
Genus: Rytidosperma Steud. - wallaby grass

Species: Rytidosperma pilosum (R. Br.) Connor & Edgar - hairy wallaby grass

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