Troubleshooting
Rose Grass problems — and how to fix them
Rose Grass (Rhodohypoxis baurii) 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.
Corm rot in winter
The most common cause of plant loss. Wet soil during dormancy causes rapid rot of the corms. Ensure near-dry conditions from autumn through late winter and use perfectly draining gritty compost.
Failure to flower
Usually caused by insufficient sunlight or skipping the dry winter rest period. Without full sun and a distinct dormancy, the corms do not set flower buds. Move to the sunniest available spot and enforce winter dryness.
Vine weevil larvae
Vine weevil grubs can destroy corms when plants are grown in containers. Apply a biological control (Steinernema kraussei nematodes) in late summer or treat with a systemic imidacloprid drench as a preventive measure.
Prevent rose grass problems before they start
Most rose grass issues are care-mismatch, not bad luck. Dial in the basics:
Rose Grass problems — FAQ
Why is my rose grass corm rot in winter?
The most common cause of plant loss. Wet soil during dormancy causes rapid rot of the corms. Ensure near-dry conditions from autumn through late winter and use perfectly draining gritty compost.
Why is my rose grass failure to flower?
Usually caused by insufficient sunlight or skipping the dry winter rest period. Without full sun and a distinct dormancy, the corms do not set flower buds. Move to the sunniest available spot and enforce winter dryness.
Why is my rose grass vine weevil larvae?
Vine weevil grubs can destroy corms when plants are grown in containers. Apply a biological control (Steinernema kraussei nematodes) in late summer or treat with a systemic imidacloprid drench as a preventive measure.