Pocket Botanist
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Check these first
- Inspect the underside of leaves for tiny clusters of insects.
- Check branches for a sticky, clear substance.
- Look for ants, which often farm aphids.
Likely causes
Aphid infestation
Most likelyHow to tell: You will see a shiny, sticky substance called honeydew on the leaves and branches. Tiny green or black insects cluster on new growth.
What to do: Spray the tree with a strong blast of water from your garden hose to knock them off. If the infestation is heavy, apply insecticidal soap once a week for 3 weeks.
Sooty mold
PossibleHow to tell: A black, powdery coating develops on the leaves after aphids have been present for a while. It grows on the sugary honeydew left behind.
What to do: Wash the leaves with a gentle soap solution to remove the mold. Focus on controlling the aphids first to stop the honeydew production.
Find out what's wrong with your little-leaf linden
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
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When to worry
A few aphids are normal, but if the tree is covered in sticky honeydew or black mold, take action immediately.
Stopping it coming back
Encourage beneficial insects like ladybugs to visit your garden, as they are natural predators of aphids.
Little-leaf linden: pests? Check yours with a photo
Every plant is a little different. Take a photo of your little-leaf linden 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 aphids kill my linden?
- Usually no, but a heavy infestation can stress the tree and cause premature leaf drop.
- Is the sticky stuff harmful to my car?
- Yes, it can be difficult to remove and may damage paint if left for a long time.
Guides to these causes
More problems with Little-leaf linden
Back to the Little-leaf linden guide
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.