Are aphids harmful to my plant?

Yes, they suck the sap and can weaken the plant. They also leave behind a sticky residue that can attract mold.

Can I just wash the leaves?

Washing with water helps, but you may need to use insecticidal soap to get rid of the entire population.

Large bindweed: curling leaves, causes and fixes

Check these first

Look closely at the undersides of the curling leaves for tiny bugs.
Check if the soil is dry and the plant needs water.
Observe if the curling happens only during the hottest part of the day.

Likely causes

Aphids
Most likely
How to tell: You see small green or black insects clustering on new growth. The leaves look distorted and sticky from honeydew.
What to do: Spray the leaves with a gentle stream of water to knock the aphids off. Apply neem oil or insecticidal soap once a week until the pests are gone.
Heat Stress
Possible
How to tell: The leaves curl inward during the hottest part of the day to conserve moisture. The plant looks wilted despite the soil being moist.
What to do: Provide some shade during the peak afternoon heat. Ensure the plant is well watered to help it cope with high temperatures.

Curling leaves on other plants

Find out what's wrong with your large bindweed

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

Curling is serious if you see a heavy infestation of pests. It is normal for leaves to curl slightly when the plant is adjusting to a new, hotter location.

Stopping it coming back

Keep the plant healthy with regular checks for pests and provide protection from extreme afternoon sun.

Large bindweed: curling leaves? Check yours with a photo

Every plant is a little different. Take a photo of your large bindweed 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

Are aphids harmful to my plant?: Yes, they suck the sap and can weaken the plant. They also leave behind a sticky residue that can attract mold.
Can I just wash the leaves?: Washing with water helps, but you may need to use insecticidal soap to get rid of the entire population.

Guides to these causes

Aphids

Why are my Calystegia silvatica leaves curling?