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Blue vervain · Verbena hastata

Why are my Blue vervain leaves curling?

It is less common for Blue vervain to have curling leaves unless it is struggling with environmental stress. Check the soil moisture first, as this plant is very sensitive to drying out.

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curling leaves on a plant
Photo: Freshclover, CC BY-SA 4.0

Check these first

  1. Touch the soil to see if it is dry.
  2. Check the leaves for a white, powdery coating.
  3. Move the plant to a spot with better air movement.

Likely causes

  1. Dehydration

    Most likely

    How to tell: The leaves look wilted and curl inward at the edges. The soil feels dry to the touch even an inch or two down.

    What to do: Water the plant thoroughly until water runs out the bottom of the pot. Maintain a schedule of watering every 2 to 4 days to keep the soil consistently damp.

  2. Powdery mildew

    Possible

    How to tell: A white, dusty coating appears on the leaves, causing them to twist or curl. This is common when air circulation is poor.

    What to do: Prune away the most heavily affected leaves to improve airflow. Apply a fungicide or a mix of 1 tablespoon of baking soda in 1 gallon of water to the foliage.

Curling leaves on other plants

Find out what's wrong with your blue 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.

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When to worry

If the leaves are turning brown and crispy along with the curling, the plant is severely dehydrated. Mild curling on a hot afternoon is normal if the plant perks back up by evening.

Stopping it coming back

Water consistently and ensure the plant has enough space between it and other plants for air to move freely.

Blue vervain: curling leaves? Check yours with a photo

Every plant is a little different. Take a photo of your blue 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

Does heat cause the leaves to curl?
Yes, extreme heat can cause the plant to curl its leaves to conserve moisture. Ensure it stays hydrated during heatwaves.
Can I cut off the curled leaves?
You can remove damaged leaves to make the plant look better. Just make sure you do not remove more than one third of the foliage at once.

Guides to these causes

More problems with Blue vervain

Back to the Blue vervain guide

This article was generated with AI on from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.