Will the curled leaves straighten out?

Usually, no. Once a leaf is damaged and curled, it will stay that way, but the new growth should come out normal once the cause is fixed.

Can too much sun cause curling?

Yes, if the plant is not getting enough water, the intense sun will cause the leaves to curl to protect themselves. Ensure you are watering every 7 to 14 days.

Japanese Mock Orange: curling leaves, causes and fixes

Check these first

Unroll a curled leaf to check for tiny insects.
Check the soil moisture level with your finger.
Observe if the curling happens mostly on new growth.

Likely causes

Aphid Infestation
Most likely
How to tell: New, tender leaves at the tips of branches look twisted or curled. If you uncurl them, you will likely find tiny aphids hiding inside.
What to do: Spray the curled leaves thoroughly with insecticidal soap or neem oil. Repeat the application every 7 days until the new growth emerges flat and healthy.
Water Stress
Possible
How to tell: The leaves curl inward to conserve moisture during hot or dry spells. The soil will feel dry more than an inch deep.
What to do: Water the plant deeply until the soil is moist 6 to 8 inches down. Apply a layer of mulch around the base to help retain moisture in the soil.

Curling leaves on other plants

Find out what's wrong with your japanese mock orange

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

Minor curling on a few leaves during a heatwave is normal. If the entire plant is curling or the leaves look stunted, it is time to intervene.

Stopping it coming back

Monitor new growth weekly for aphids and maintain a consistent watering schedule. Mulching helps keep the roots cool and hydrated during summer.

Japanese Mock Orange: curling leaves? Check yours with a photo

Every plant is a little different. Take a photo of your japanese mock orange 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 the curled leaves straighten out?: Usually, no. Once a leaf is damaged and curled, it will stay that way, but the new growth should come out normal once the cause is fixed.
Can too much sun cause curling?: Yes, if the plant is not getting enough water, the intense sun will cause the leaves to curl to protect themselves. Ensure you are watering every 7 to 14 days.

Guides to these causes

Aphids

Why are the leaves on my Japanese Mock Orange curling?

Check these first

Not sure what's wrong with your japanese mock orange?