Can I just pick off the aphids?

Yes, if the infestation is small, you can manually remove them. Just be careful not to damage the delicate leaves.

Will my leaves uncurl once the stress is gone?

Usually, the affected leaves will remain curled. Focus on keeping the new growth healthy and straight.

Why are my American vetch leaves curling? Causes and fixes

Check these first

Inspect the undersides of curled leaves for tiny aphids.
Check the soil moisture to see if the plant is thirsty.
Observe if the curling happens only during the hottest part of the day.

Likely causes

Aphid infestation
Most likely
How to tell: You will see small green or black insects clustering on the tender new growth. The leaves often look distorted or curled as the aphids suck the sap.
What to do: Spray the plant with a strong stream of water to knock the aphids off. If they persist, apply insecticidal soap once a week until the insects are gone.
Heat stress
Possible
How to tell: The leaves curl inward during the hottest part of the day to conserve moisture. This usually happens when the plant is exposed to intense afternoon sun without enough water.
What to do: Move your vetch to a spot with partial shade during the afternoon. Ensure you water every 3 to 7 days when the top inch of soil feels dry.

Curling leaves on other plants

Find out what's wrong with your american vetch

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

Worry if the curling is accompanied by yellowing or stunted growth. It is normal for leaves to curl slightly if the plant is just adjusting to a new location.

Stopping it coming back

Keep your vetch healthy with consistent watering and good air circulation to discourage pests.

American vetch: curling leaves? Check yours with a photo

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

Can I just pick off the aphids?: Yes, if the infestation is small, you can manually remove them. Just be careful not to damage the delicate leaves.
Will my leaves uncurl once the stress is gone?: Usually, the affected leaves will remain curled. Focus on keeping the new growth healthy and straight.

Guides to these causes

Aphids

Why are my American vetch leaves curling?

Check these first

Not sure what's wrong with your american vetch?