Should I cut off the yellow leaves?

Yes, you can snip them off with clean scissors. They will not turn green again and removing them helps the plant focus energy on new growth.

Can low light cause yellow leaves?

Yes, if the plant is not getting enough light, it may shed older leaves to conserve energy. Move it to a brighter spot.

Why are my Golden trumpet leaves turning yellow?

Check these first

Feel the top 2 inches of soil with your finger.
Inspect the drainage holes for blockages.
Check the underside of the leaves for pests.

Likely causes

Overwatering
Most likely
How to tell: The leaves turn yellow and feel soft or mushy to the touch. The soil stays wet for more than a week.
What to do: Stop watering immediately and let the top 2 inches of soil dry out. Ensure your pot has drainage holes so excess water can escape.
Iron deficiency
Possible
How to tell: The veins of the leaves stay green while the rest of the leaf turns yellow. This often happens in soil with a high pH.
What to do: Apply a chelated iron supplement or a fertilizer formulated for acid loving plants. Follow the label instructions for the correct dosage.

When to worry

It is normal for the oldest leaves at the bottom of the plant to yellow and drop occasionally. Be concerned if new growth is yellowing rapidly.

Stopping it coming back

Maintain a consistent watering schedule and feed your plant with a balanced fertilizer during the growing season.

Not sure which one it is? Photograph your golden trumpet.

This page lists the usual causes. Pocket Botanist looks at your actual leaf and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.

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Questions people ask

Should I cut off the yellow leaves?: Yes, you can snip them off with clean scissors. They will not turn green again and removing them helps the plant focus energy on new growth.
Can low light cause yellow leaves?: Yes, if the plant is not getting enough light, it may shed older leaves to conserve energy. Move it to a brighter spot.