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Downy birch · Betula pubescens

Why are my Downy birch leaves curling?

Curling leaves are less common for this tree and are usually caused by pest activity like the birch leaf miner. Check the underside of the curled leaves for small larvae or blotches first.

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

Check these first

  1. Look for blotches or tunnels on the leaves.
  2. Check the soil moisture to see if the tree is thirsty.
  3. Inspect the underside of leaves for tiny insects.

Likely causes

  1. Birch leaf miner

    Possible

    How to tell: You will see small brown blotches or tunnels on the leaves where the larvae are feeding. The leaves often curl or crinkle around these damaged areas.

    What to do: Prune and dispose of infested leaves to reduce the population. In severe cases, apply a systemic insecticide labeled for leaf miners in early spring.

  2. Drought stress

    Possible

    How to tell: The edges of the leaves curl inward and turn crispy or brown during hot, dry spells. The whole tree may look wilted if the water deficit is severe.

    What to do: Deeply water the tree to ensure moisture reaches the root zone. Apply a layer of organic mulch to help retain soil moisture.

Curling leaves on other plants

Find out what's wrong with your downy birch

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

Worry if the curling affects a large portion of the canopy or if the tree is losing leaves rapidly. Minor curling on a few leaves during a heatwave is usually manageable.

Stopping it coming back

Keep the tree healthy with consistent watering and monitor for early signs of leaf miner activity in the spring.

Downy birch: curling leaves? Check yours with a photo

Every plant is a little different. Take a photo of your downy birch 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

Do birch trees flower?
Yes, they produce catkins in the spring. They need a period of winter chill to bloom properly.
Are curled leaves a sign of disease?
Often it is a sign of pests or environmental stress rather than a fungal disease. Check for insects first.

Guides to these causes

More problems with Downy birch

Back to the Downy birch 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.