Troubleshooting
Greater Quaking Grass problems — and how to fix them
Greater Quaking Grass (Briza maxima) 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.
Aggressive self-seeding
Drops abundant viable seed and can naturalise into a weed, especially in mild climates; deadhead or cut back before seeds shatter to control spread.
Flopping stems
In too much shade or rich soil the slender culms lodge and sprawl; site in full sun on lean ground for sturdy, upright stems.
Rust fungus
Orange pustules can appear on blades in damp, crowded conditions; improve airflow, avoid overhead watering and remove affected foliage.
Shattering seed heads
Prized spikelets break apart once fully ripe; harvest for drying while still green-to-straw and before they dry on the plant.
Prevent greater quaking grass problems before they start
Most greater quaking grass issues are care-mismatch, not bad luck. Dial in the basics:
Looking for greater quaking grass in general rather than its problems? Read the full greater quaking grass care guide — light, water, soil and feeding.
Greater Quaking Grass problems — FAQ
Why is my greater quaking grass aggressive self-seeding?
Drops abundant viable seed and can naturalise into a weed, especially in mild climates; deadhead or cut back before seeds shatter to control spread.
Why is my greater quaking grass flopping stems?
In too much shade or rich soil the slender culms lodge and sprawl; site in full sun on lean ground for sturdy, upright stems.
Why is my greater quaking grass rust fungus?
Orange pustules can appear on blades in damp, crowded conditions; improve airflow, avoid overhead watering and remove affected foliage.
Why is my greater quaking grass shattering seed heads?
Prized spikelets break apart once fully ripe; harvest for drying while still green-to-straw and before they dry on the plant.