Check these first
- Inspect the leaf axils for white cottony fluff.
- Check the undersides of leaves for sticky residue.
- Isolate the plant from your other houseplants.
Likely causes
Mealybug infestation
Most likelyHow to tell: You will see white, cottony masses in the joints where leaves meet the stem. The leaves might also look sticky or start to yellow.
What to do: Dab the bugs with a cotton swab dipped in rubbing alcohol to kill them on contact. Follow up by spraying the entire plant with insecticidal soap every 7 days for a month.
Poor air circulation
PossibleHow to tell: Plants kept in stagnant, humid corners are more prone to pest outbreaks. If the air feels heavy around the plant, it is a prime target.
What to do: Move your plant to a spot with better airflow. You can also use a small fan nearby on a low setting to keep the air moving.
Find out what's wrong with your spur flower
The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
When to worry
If you see the bugs spreading to your other plants, it is time to take serious action. A few bugs are manageable, but a full infestation can weaken the plant quickly.
Stopping it coming back
Wipe down your plant leaves with a damp cloth every few weeks to remove dust and potential pests. Keep your plant healthy with proper light to help it resist attacks.
Spur flower: pests? Check yours with a photo
Every plant is a little different. Take a photo of your spur flower and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
Get the app · Or check it from a photo now, free
Questions people ask
- Will these bugs kill my plant?
- If left untreated, they will drain the plant of nutrients and cause it to decline. Catching them early makes them very easy to manage.
- Can I just wash them off?
- Washing helps, but mealybugs are persistent. You must use alcohol or insecticidal soap to ensure you kill the eggs and hidden adults.
Guides to these causes
More problems with Spur flower
- Why is my Plectranthus wilting and the soil smells bad?
- Why is my Plectranthus growing long and sparse stems?
- Why are my Plectranthus leaves turning yellow?
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- Why are my Plectranthus leaf tips turning brown?
- Why is my Plectranthus losing its leaves?
- What are these spots on my Plectranthus leaves?
- Why is my Plectranthus not blooming?
This article was generated with AI on from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.

