Troubleshooting
indian grass problems — and how to fix them
indian grass (Sorghastrum nutans) 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.
Lodging (stems collapsing) in fertile soil
Indian grass planted in rich, amended garden borders frequently produces lax, floppy culms that lodge after rain or wind. Avoid fertilising established plants and grow in lean, well-drained soil. Cut back hard in late winter to reset the structure.
Slow establishment in first season
Like many warm-season native grasses, Indian grass invests heavily in root development in year one and may appear static above ground. Water regularly and do not over-fertilise. Visible above-ground growth increases markedly in years two and three.
Rust fungus (Puccinia spp.)
Orange-yellow pustules may appear on leaves in warm, humid conditions. Usually cosmetic and not life-threatening; improve airflow and avoid overhead irrigation. Remove and bin heavily infected foliage. Burning or cutting to ground level in late winter removes overwintering spores.
Prevent indian grass problems before they start
Most indian grass issues are care-mismatch, not bad luck. Dial in the basics:
indian grass problems — FAQ
Why is my indian grass lodging (stems collapsing) in fertile soil?
Indian grass planted in rich, amended garden borders frequently produces lax, floppy culms that lodge after rain or wind. Avoid fertilising established plants and grow in lean, well-drained soil. Cut back hard in late winter to reset the structure.
Why is my indian grass slow establishment in first season?
Like many warm-season native grasses, Indian grass invests heavily in root development in year one and may appear static above ground. Water regularly and do not over-fertilise. Visible above-ground growth increases markedly in years two and three.
Why is my indian grass rust fungus (puccinia spp.)?
Orange-yellow pustules may appear on leaves in warm, humid conditions. Usually cosmetic and not life-threatening; improve airflow and avoid overhead irrigation. Remove and bin heavily infected foliage. Burning or cutting to ground level in late winter removes overwintering spores.