Troubleshooting
Stepladder Ginger problems — and how to fix them
Stepladder Ginger (Costus malortieanus) is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Scale insects on stems
Armoured and soft scale insects can colonise the cane-like stems, causing yellowing and sticky honeydew residue; scrape off manually, then treat with horticultural oil or systemic insecticide for heavy infestations.
Leaf browning in low humidity
Although more tolerant than other Costus, prolonged dry indoor air causes the attractive velvety leaf tips and margins to brown; raise ambient humidity above 50% using a humidifier or pebble tray.
Prevent stepladder ginger problems before they start
Most stepladder ginger issues are care-mismatch, not bad luck. Dial in the basics:
Stepladder Ginger problems — FAQ
Why is my stepladder ginger scale insects on stems?
Armoured and soft scale insects can colonise the cane-like stems, causing yellowing and sticky honeydew residue; scrape off manually, then treat with horticultural oil or systemic insecticide for heavy infestations.
Why is my stepladder ginger leaf browning in low humidity?
Although more tolerant than other Costus, prolonged dry indoor air causes the attractive velvety leaf tips and margins to brown; raise ambient humidity above 50% using a humidifier or pebble tray.