Will aphids kill my linden tree?

Aphids rarely kill a mature linden, but they can weaken it. Treating them early prevents the sticky honeydew from attracting other issues like sooty mold.

Do American lindens flower?

Yes, they produce fragrant yellow white flowers in early summer. They need full sun and a few years of growth to reach their blooming potential.

Why are my American linden leaves curling? Causes and fixes

Check these first

Look closely at the undersides of the curled leaves for aphids.
Check if the leaves look better in the early morning compared to the afternoon.
Examine the tree for any sticky residue on the leaves or ground.

Likely causes

Aphid infestation
Most likely
How to tell: You will see small insects on the undersides of leaves and a sticky substance called honeydew on the foliage. The leaves often curl as the aphids feed on the sap.
What to do: Spray the leaves with a strong stream of water to knock the aphids off. If the infestation is heavy, apply insecticidal soap according to the label instructions.
Heat stress
Possible
How to tell: Leaves curl inward during the hottest part of the day to conserve moisture. The tree usually recovers once the sun goes down and temperatures drop.
What to do: Provide extra water during extended heat waves to keep the root zone hydrated. Apply a 2 to 3 inch layer of mulch around the base to keep the soil cool.

Curling leaves on other plants

Find out what's wrong with your american 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.

When to worry

If the curling is accompanied by yellowing or premature leaf drop, it is a sign of a larger problem. Minor curling during a hot afternoon is a normal reaction to heat.

Stopping it coming back

Keep the tree healthy with proper watering and monitor for pests early in the spring.

American linden: curling leaves? Check yours with a photo

Every plant is a little different. Take a photo of your american 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.

Get the app · Or check it from a photo now, free

Questions people ask

Will aphids kill my linden tree?: Aphids rarely kill a mature linden, but they can weaken it. Treating them early prevents the sticky honeydew from attracting other issues like sooty mold.
Do American lindens flower?: Yes, they produce fragrant yellow white flowers in early summer. They need full sun and a few years of growth to reach their blooming potential.

Guides to these causes

Aphids

Why are my American linden leaves curling?