Should I cut back the leggy stems?

Yes, pruning back the long stems will encourage the plant to grow bushier. Do this in the spring to help the plant recover.

Can I move it to full sun suddenly?

If it has been in the shade, introduce it to full sun gradually over a week to prevent leaf scorch.

Why is my Western wallflower looking leggy? Causes and fixes

Check these first

Measure the hours of direct sun the plant receives.
Check if the plant is being shaded by taller neighbors.
Examine the stems for signs of weak, rapid growth.

Likely causes

Insufficient light
Most likely
How to tell: The stems are long, thin, and stretching toward the nearest light source. The plant will look sparse rather than bushy.
What to do: Move the plant to a location that receives full, direct sun for at least 6 to 8 hours a day. If you are growing indoors, you may need a strong grow light.
Excessive nitrogen
Possible
How to tell: This is less common for this plant, but usually caused by over-fertilizing with high nitrogen products. The plant grows too fast and becomes weak and floppy.
What to do: Stop using nitrogen-heavy fertilizers immediately. Switch to a balanced, low-dose fertilizer or stop feeding altogether until the plant stabilizes.

Leggy growth in other plants

Find out what's wrong with your western wallflower

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 stems are so weak they cannot support their own weight. Some stretching is normal if the plant is coming out of a low-light winter season.

Stopping it coming back

Provide full sun from the start. Pinch back the tips of young stems to encourage branching and a fuller shape.

Western wallflower: leggy growth? Check yours with a photo

Every plant is a little different. Take a photo of your western wallflower 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

Should I cut back the leggy stems?: Yes, pruning back the long stems will encourage the plant to grow bushier. Do this in the spring to help the plant recover.
Can I move it to full sun suddenly?: If it has been in the shade, introduce it to full sun gradually over a week to prevent leaf scorch.

Why is my Western wallflower looking leggy?