Pocket Botanist
Check these first
- Observe how many hours of direct sun the plant receives.
- Check if the stems are bending toward a window or light source.
- Review your recent fertilizing schedule.
Likely causes
Insufficient light
Most likelyHow to tell: The stems are long and thin with large gaps between the leaves. The plant leans heavily toward the nearest light source.
What to do: Move your mugwort to a spot that receives at least 6 to 8 hours of direct sun daily. If growing indoors, place it in a south facing window or use a grow light.
Excessive nitrogen fertilizer
PossibleHow to tell: The plant is growing very fast but the stems are flimsy and cannot support their own weight. The leaves may be a very dark, lush green.
What to do: Stop fertilizing for the rest of the season. If the plant is very tall, you can prune it back by one third to encourage bushier, stronger growth.
Find out what's wrong with your mugwort
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
It is normal for mugwort to reach 3 to 5 feet in height, but it should remain upright. Worry if the stems are collapsing or snapping under their own weight.
Stopping it coming back
Ensure your plant gets plenty of full sun throughout the growing season to keep stems thick and sturdy.
Mugwort: leggy growth? Check yours with a photo
Every plant is a little different. Take a photo of your mugwort 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
- Can I prune my leggy mugwort?
- Yes, pruning back the top growth will encourage the plant to branch out and become bushier. Do this in late spring or early summer.
- Does mugwort need support?
- Usually no, but if your plant is in a windy area or not getting enough light, a simple garden stake can help keep it upright.
More problems with Mugwort
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.