Troubleshooting
Yellow Trumpetbush problems — and how to fix them
Yellow Trumpetbush (Tecoma stans) 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.
Glasshouse red spider mite
Common under glass or in hot, dry conditions. Webbing on undersides of leaves and stippled foliage are signs. Increase humidity, remove affected growth, and apply an appropriate miticide or introduce predatory mites.
Whitefly
Small white insects cluster on leaf undersides, causing yellowing. Use yellow sticky traps, insecticidal soap, or neem oil. Ensure good air circulation to deter infestations.
Failure to flower
Usually caused by insufficient direct sunlight or over-feeding with nitrogen. Move to a sunnier position, reduce nitrogen, and apply a high-potassium feed to encourage blooming.
Prevent yellow trumpetbush problems before they start
Most yellow trumpetbush issues are care-mismatch, not bad luck. Dial in the basics:
Yellow Trumpetbush problems — FAQ
Why is my yellow trumpetbush glasshouse red spider mite?
Common under glass or in hot, dry conditions. Webbing on undersides of leaves and stippled foliage are signs. Increase humidity, remove affected growth, and apply an appropriate miticide or introduce predatory mites.
Why is my yellow trumpetbush whitefly?
Small white insects cluster on leaf undersides, causing yellowing. Use yellow sticky traps, insecticidal soap, or neem oil. Ensure good air circulation to deter infestations.
Why is my yellow trumpetbush failure to flower?
Usually caused by insufficient direct sunlight or over-feeding with nitrogen. Move to a sunnier position, reduce nitrogen, and apply a high-potassium feed to encourage blooming.