Can I prune the leggy stems?

Yes, you can trim back the long, weak growth to encourage a bushier habit. Just make sure to move the plant to a brighter spot afterward.

Will the stems thicken up if I move it?

Existing leggy stems will not thicken, but new growth will be much stronger and healthier once the plant gets more light.

Black bindweed: leggy growth, causes and fixes

Check these first

Observe the light levels in your plant's current spot.
Check if the plant is leaning toward a window or light source.
Inspect the spacing between individual stems.

Likely causes

Insufficient light
Most likely
How to tell: The stems are thin and pale with long distances between the leaf nodes. The plant leans heavily toward the nearest light source.
What to do: Move your plant to a location that receives full, direct sun for at least 6 to 8 hours a day. If you are growing it indoors, place it directly in a south facing window or use a high output grow light.
Crowding
Most likely
How to tell: Multiple plants are tangled together, causing them to compete for light and airflow. The stems appear weak and spindly despite adequate light.
What to do: Thin out the seedlings or space your containers further apart to ensure each plant gets its own light. Provide a trellis or support structure to help the vines climb properly.

Leggy growth in other plants

Find out what's wrong with your black bindweed

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 normal for this fast growing vine to reach for support, but if the stems are collapsing under their own weight, the light is definitely too low.

Stopping it coming back

Provide a sturdy trellis early on and ensure the plant receives full sun throughout the day.

Black bindweed: leggy growth? Check yours with a photo

Every plant is a little different. Take a photo of your black bindweed 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

Can I prune the leggy stems?: Yes, you can trim back the long, weak growth to encourage a bushier habit. Just make sure to move the plant to a brighter spot afterward.
Will the stems thicken up if I move it?: Existing leggy stems will not thicken, but new growth will be much stronger and healthier once the plant gets more light.

Why is my black bindweed growing so long and leggy?