Troubleshooting
Palmarosa problems — and how to fix them
Palmarosa (Cymbopogon martinii) 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.
Root rot in waterlogged soil
Ensure pots and beds have excellent drainage. Never let roots sit in standing water.
Rust fungus
Orange pustules on leaves in humid conditions. Improve airflow and remove infected blades promptly.
Mealybugs
White woolly clusters at leaf bases, especially on container plants. Treat with neem oil or insecticidal soap.
Die-back in cold winters
Not frost-hardy. Lift and overwinter in a frost-free greenhouse in USDA zones below 9.
Clump overcrowding
Older clumps become woody and less productive. Divide every 2-3 years in spring to rejuvenate.
Prevent palmarosa problems before they start
Most palmarosa issues are care-mismatch, not bad luck. Dial in the basics:
Palmarosa problems — FAQ
Why is my palmarosa root rot in waterlogged soil?
Ensure pots and beds have excellent drainage. Never let roots sit in standing water.
Why is my palmarosa rust fungus?
Orange pustules on leaves in humid conditions. Improve airflow and remove infected blades promptly.
Why is my palmarosa mealybugs?
White woolly clusters at leaf bases, especially on container plants. Treat with neem oil or insecticidal soap.
Why is my palmarosa die-back in cold winters?
Not frost-hardy. Lift and overwinter in a frost-free greenhouse in USDA zones below 9.
Why is my palmarosa clump overcrowding?
Older clumps become woody and less productive. Divide every 2-3 years in spring to rejuvenate.