Are aphids harmful to Crosswort?

Yes, they suck the sap from the plant and cause the leaves to curl and weaken. They can also spread viruses between plants.

Can I use dish soap to kill aphids?

A very mild solution of water and a few drops of plain dish soap can work, but insecticidal soap is safer for the plant. Avoid using soaps with degreasers or heavy fragrances.

Why are my Crosswort leaves curling? Causes and fixes

Check these first

Look closely at the undersides of the curled leaves.
Check for tiny insects or sticky residue on the stems.
Feel the soil to see if the plant is thirsty from the heat.

Likely causes

Aphid Infestation
Most likely
How to tell: You see small clusters of tiny green or black insects on the stems and leaf undersides. The leaves look distorted or curled.
What to do: Spray the plant with a strong stream of water to knock the aphids off. Use insecticidal soap or neem oil 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 better in the evening.
What to do: Provide some afternoon shade during heat waves. Ensure the plant is watered deeply so it can handle the high temperatures.

Curling leaves on other plants

Find out what's wrong with your crosswort

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 leaves remain curled even after the temperature drops or the pests are removed, the damage may be permanent. It is normal for leaves to curl slightly during very hot, dry afternoons.

Stopping it coming back

Keep the plant healthy with consistent watering and inspect it weekly for early signs of aphids.

Crosswort: curling leaves? Check yours with a photo

Every plant is a little different. Take a photo of your crosswort 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 Crosswort?: Yes, they suck the sap from the plant and cause the leaves to curl and weaken. They can also spread viruses between plants.
Can I use dish soap to kill aphids?: A very mild solution of water and a few drops of plain dish soap can work, but insecticidal soap is safer for the plant. Avoid using soaps with degreasers or heavy fragrances.

Guides to these causes

Aphids

Why are my Crosswort leaves curling?