Troubleshooting
Common Tussock Grass problems — and how to fix them
Common Tussock Grass (Poa labillardieri) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Tussock decline / dead centre in old clumps
Very old tussocks (10+ years) may develop a hollow or dead centre as the plant matures. In garden settings, divide and replant vigorous outer sections in late winter or early spring. In natural revegetation, this is part of the normal life cycle.
Rust and leaf spot in humid conditions
Fungal leaf diseases may affect tussocks in very humid, poorly ventilated locations. Rarely life-threatening. Improve air circulation; remove and dispose of the worst affected leaves. Cut clumps back hard in late winter to remove accumulated diseased material.
Slow establishment from tube stock
Small tube-stock plants may appear static in year one while developing their root system. Do not mistake slow above-ground growth for failure — consistent deep watering through the first summer will produce a noticeably larger tussock by year two.
Prevent common tussock grass problems before they start
Most common tussock grass issues are care-mismatch, not bad luck. Dial in the basics:
Looking for common tussock grass in general rather than its problems? Read the full common tussock grass care guide — light, water, soil and feeding.
Common Tussock Grass problems — FAQ
Why is my common tussock grass tussock decline / dead centre in old clumps?
Very old tussocks (10+ years) may develop a hollow or dead centre as the plant matures. In garden settings, divide and replant vigorous outer sections in late winter or early spring. In natural revegetation, this is part of the normal life cycle.
Why is my common tussock grass rust and leaf spot in humid conditions?
Fungal leaf diseases may affect tussocks in very humid, poorly ventilated locations. Rarely life-threatening. Improve air circulation; remove and dispose of the worst affected leaves. Cut clumps back hard in late winter to remove accumulated diseased material.
Why is my common tussock grass slow establishment from tube stock?
Small tube-stock plants may appear static in year one while developing their root system. Do not mistake slow above-ground growth for failure — consistent deep watering through the first summer will produce a noticeably larger tussock by year two.