Are aphids harmful to my sneezeweed?

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

Will the leaves uncurl?

If the cause is heat, they will uncurl once it cools down. If the cause is aphids, the damaged leaves may stay curled, but new growth will be healthy once the pests are gone.

Common sneezeweed: curling leaves, causes and fixes

Check these first

Check the undersides of the leaves for tiny bugs.
Look for sticky residue on the leaves.
Observe if the leaves flatten out at night.

Likely causes

Aphids
Most likely
How to tell: You see small green or black insects clustering on new growth. The leaves may look distorted or sticky from honeydew.
What to do: Spray the leaves with a strong stream of water to knock the aphids off. For heavy infestations, use insecticidal soap every 5 to 7 days.
Heat Stress
Possible
How to tell: Leaves curl inward during the hottest part of the day to conserve moisture. They usually flatten out by evening.
What to do: Ensure the plant is well watered during heat waves. If the plant is in a container, move it to a spot that gets afternoon shade.

Curling leaves on other plants

Find out what's wrong with your common sneezeweed

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 during extreme heat to protect themselves.

Stopping it coming back

Keep the plant healthy with proper water and light, and inspect the new growth regularly for early signs of aphids.

Common sneezeweed: curling leaves? Check yours with a photo

Every plant is a little different. Take a photo of your common sneezeweed 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.

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Questions people ask

Are aphids harmful to my sneezeweed?: Yes, they suck the sap and can weaken the plant. They also leave behind sticky residue that can attract other issues.
Will the leaves uncurl?: If the cause is heat, they will uncurl once it cools down. If the cause is aphids, the damaged leaves may stay curled, but new growth will be healthy once the pests are gone.

Guides to these causes

Aphids

Why are my Helenium autumnale leaves curling?

Check these first

Not sure what's wrong with your common sneezeweed?