How to grow wallaby grass
Overview
Wallaby grass (Rytidosperma caespitosum) is a fine-leaved, clumping native grass valued for its soft, flowing texture and drought tolerance. It is grown primarily for movement and structure in dry gardens, meadow-style plantings, and as a low-maintenance groundcover. A key point for growers is that it prefers full sun and well-drained soil, and will not tolerate wet feet or heavy clay.
Soil Preparation
Wallaby grass prefers a free-draining, sandy or loamy soil with a pH of 5.5–7.0. It will not tolerate heavy clay or waterlogged conditions. Improve drainage by adding coarse sand or gravel before planting; no additional fertiliser is needed at planting time.
Growing Guide
Plant wallaby grass in full sun in well-drained soil; it will not thrive in shade or damp positions. Space clumps 30–50 cm apart for a natural tussock effect. Direct sow seed in autumn or spring at 2–3 mm depth, or plant established plugs. Avoid overwatering: once the root system is established, the plant is highly drought-tolerant. For best results, allow the soil to dry between waterings.
Sowing
Sow seed directly into prepared soil in autumn or spring at 2–3 mm depth, with 30–50 cm spacing. Germination takes 14–21 days in warm, moist conditions. Alternatively, plant plugs or small clumps for faster establishment.
Care
Feed lightly in spring with a low-nitrogen native fertiliser to avoid lush growth. Cut back old foliage to 5–10 cm in late winter to encourage fresh, tidy tussocks. No regular pruning is needed beyond this annual tidy-up.
Companion Planting
Wallaby grass pairs beautifully with other native daisies and low-growing shrubs. Good companions include murnong (Microseris lanceolata), blue flax lily (Dianella caerulea), and kangaroo grass (Themeda triandra). Avoid planting near aggressive, spreading grasses like kikuyu or buffalo grass, which will outcompete it.
Common Pests & Risks
Wallaby grass is generally pest-free, but may occasionally be affected by scale insects or mealybugs in humid conditions. Control with a horticultural oil spray if needed. Slugs and snails can damage young shoots in spring; use iron-based pellets or hand-pick.
Troubleshooting
Yellowing leaves: caused by overwatering or poor drainage; reduce watering and improve soil drainage. Brown leaf tips: caused by dry air or underwatering; increase humidity or water more deeply. Sparse growth: caused by insufficient sun; move to full sun position. Stunted clumps: caused by heavy clay soil; amend with sand or gravel. Leaf spot: caused by fungal disease in wet conditions; avoid overhead watering.