Will my leaves uncurl once the aphids are gone?

The existing leaves that are already damaged will likely stay curled. However, the new growth should appear healthy and flat once the pest issue is resolved.

Should I cut off the curled leaves?

You can trim them off if they look unsightly, but it is not strictly necessary. Focus on treating the cause so the rest of the plant stays healthy.

Western wallflower: curling leaves, causes and fixes

Check these first

Inspect the undersides of the curled leaves for small insects.
Check if the soil is dry to the touch.
Observe if the leaves flatten out after the sun sets.

Likely causes

Aphids
Most likely
How to tell: You will see tiny green or black insects clustering on the new growth and flower buds. They suck the sap, which causes the leaves to twist and curl as they grow.
What to do: Spray the plant with a strong stream of water to knock the aphids off. If they persist, apply insecticidal soap directly to the affected areas every 5 to 7 days until they are gone.
Heat Stress
Possible
How to tell: The leaves curl inward during the hottest part of the day to conserve moisture. If the plant perks up once the sun goes down, it is likely just reacting to the heat.
What to do: Ensure the plant is watered deeply every 7 to 14 days when the top few inches of soil are dry. Adding a layer of mulch around the base will help keep the roots cool and retain moisture.

Curling leaves on other plants

Find out what's wrong with your western wallflower

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 that does not improve with water. It is normal for leaves to curl slightly during a heat wave.

Stopping it coming back

Keep your wallflower healthy with consistent watering and regular checks for pests during the spring and summer.

Western wallflower: curling leaves? Check yours with a photo

Every plant is a little different. Take a photo of your western wallflower 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 my leaves uncurl once the aphids are gone?: The existing leaves that are already damaged will likely stay curled. However, the new growth should appear healthy and flat once the pest issue is resolved.
Should I cut off the curled leaves?: You can trim them off if they look unsightly, but it is not strictly necessary. Focus on treating the cause so the rest of the plant stays healthy.

Guides to these causes

Aphids

Why are my Western wallflower leaves curling?