Will my curled leaves straighten out?

Usually, the leaves that are already curled will stay that way. Focus on keeping the plant healthy so the new growth comes in flat and green.

Can I use neem oil on my water smartweed?

Be very careful using oil based products near water. It is better to use a simple water spray or insecticidal soap to avoid harming any beneficial insects or fish in your pond.

Why are my water smartweed leaves curling? Causes and fixes

Check these first

Inspect the undersides of the curled leaves for tiny insects.
Check the water level in your container to ensure the soil is fully saturated.
Observe if the leaves flatten out again during the cooler evening hours.

Likely causes

Aphid infestation
Most likely
How to tell: You will see small clusters of green or black insects on the new growth and flower spikes. They suck the sap, which causes the leaves to twist and curl as they grow.
What to do: Spray the leaves with a strong stream of water to knock the bugs off. If they persist, use a gentle insecticidal soap spray once a week until they are gone.
Heat stress
Possible
How to tell: The leaves curl inward during the hottest part of the day when the plant loses water faster than it can take it up. If the leaves recover at night, the plant is just trying to conserve moisture.
What to do: Ensure the water level in your container or pond is topped off so the roots stay submerged. If the plant is in a shallow pot, move it to a spot with afternoon shade.

Curling leaves on other plants

Find out what's wrong with your water smartweed

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

It is serious if the leaves remain curled and start to turn yellow or brown. It is normal for the plant to curl slightly during peak afternoon heat if it is in full sun.

Stopping it coming back

Keep the plant consistently wet and monitor for pests every time you check the water level.

Water smartweed: curling leaves? Check yours with a photo

Every plant is a little different. Take a photo of your water smartweed 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.

Get the app · Or check it from a photo now, free

Questions people ask

Will my curled leaves straighten out?: Usually, the leaves that are already curled will stay that way. Focus on keeping the plant healthy so the new growth comes in flat and green.
Can I use neem oil on my water smartweed?: Be very careful using oil based products near water. It is better to use a simple water spray or insecticidal soap to avoid harming any beneficial insects or fish in your pond.

Guides to these causes

Aphids

Why are my water smartweed leaves curling?

Check these first

Not sure what's wrong with your water smartweed?