Troubleshooting
Costus Woodsonii problems — and how to fix them
Costus Woodsonii (Costus woodsonii) 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.
Brown, crisp leaf edges
Low humidity or under-watering scorches the leaf margins. Keep humidity high with a pebble tray or humidifier, maintain steady soil moisture and keep it clear of dry heat sources.
Rhizome rot
Cold, soggy, poorly drained soil rots the rhizomes. Use a free-draining mix, water more sparingly in cool weather and ensure the pot drains freely so rhizomes never sit in water.
Cold damage
Temperatures near or below freezing kill top growth and can damage rhizomes. Keep it above about 10°C; bring container plants indoors well before the first autumn frost.
Spider mites
Warm, dry indoor air encourages spider mites, shown by fine stippling and webbing on leaves. Raise humidity, check leaf undersides and treat early with insecticidal soap.
Prevent costus woodsonii problems before they start
Most costus woodsonii issues are care-mismatch, not bad luck. Dial in the basics:
Looking for costus woodsonii in general rather than its problems? Read the full costus woodsonii care guide — light, water, soil and feeding.
Costus Woodsonii problems — FAQ
Why is my costus woodsonii brown, crisp leaf edges?
Low humidity or under-watering scorches the leaf margins. Keep humidity high with a pebble tray or humidifier, maintain steady soil moisture and keep it clear of dry heat sources.
Why is my costus woodsonii rhizome rot?
Cold, soggy, poorly drained soil rots the rhizomes. Use a free-draining mix, water more sparingly in cool weather and ensure the pot drains freely so rhizomes never sit in water.
Why is my costus woodsonii cold damage?
Temperatures near or below freezing kill top growth and can damage rhizomes. Keep it above about 10°C; bring container plants indoors well before the first autumn frost.
Why is my costus woodsonii spider mites?
Warm, dry indoor air encourages spider mites, shown by fine stippling and webbing on leaves. Raise humidity, check leaf undersides and treat early with insecticidal soap.