Will my curled leaves straighten out?

Usually, once the stressor is removed, new leaves will grow in flat and healthy. The existing curled leaves may stay that way, but they will still function for the plant.

Can I use neem oil for the pests?

Yes, neem oil is a good option for aphids on White Vervain. Apply it in the evening to avoid burning the leaves in the sun.

Why are my White Vervain leaves curling? Causes and fixes

Check these first

Inspect the undersides of the leaves for tiny insects.
Touch the soil to see if it feels dry or parched.
Observe if the leaves recover after the sun goes down.

Likely causes

Aphid Infestation
Most likely
How to tell: You will see tiny green or black insects clustered on the undersides of leaves or near the new growth. The leaves often look distorted or curled as the pests suck out the plant juices.
What to do: Spray the leaves with a gentle 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 water. If they perk back up at night, the plant is just trying to stay cool.
What to do: Provide some afternoon shade if your plant is in full sun. Make sure to water deeply in the morning so the roots stay hydrated through the heat.

Curling leaves on other plants

Find out what's wrong with your white vervain

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

Be concerned if the curling is accompanied by yellowing or if the leaves remain curled even when the soil is moist. It is normal for leaves to curl slightly during extreme heat waves as a natural defense.

Stopping it coming back

Keep your plant well watered during dry spells and check for pests every time you water to catch them early.

White vervain: curling leaves? Check yours with a photo

Every plant is a little different. Take a photo of your white vervain 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

Will my curled leaves straighten out?: Usually, once the stressor is removed, new leaves will grow in flat and healthy. The existing curled leaves may stay that way, but they will still function for the plant.
Can I use neem oil for the pests?: Yes, neem oil is a good option for aphids on White Vervain. Apply it in the evening to avoid burning the leaves in the sun.

Guides to these causes

Aphids

Why are my White Vervain leaves curling?

Check these first

Not sure what's wrong with your white vervain?