Pocket Botanist
Check these first
- Check if the plant is shaded by nearby trees or buildings.
- Feel the soil to see if it is staying too damp for too long.
- Look for signs of rapid growth after a heavy rain.
Likely causes
Low light levels
Most likelyHow to tell: The stems are long, thin, and leaning heavily toward the nearest light source.
What to do: Relocate the plant to a site with full, direct sun. If you cannot move it, prune the stems back by half to encourage bushier, stronger growth.
Rich or moist soil
PossibleHow to tell: The plant grows very fast but the stems are weak and cannot support the flower heads.
What to do: Avoid adding organic matter or compost to the planting site. Ensure the soil drains well so the roots do not stay wet.
Find out what's wrong with your yarrow
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 yarrow to lean slightly after a heavy storm, but if it is constantly falling over, it needs more sun.
Stopping it coming back
Plant in full sun and avoid overwatering or overfeeding your yarrow.
Yarrow: leggy growth? Check yours with a photo
Every plant is a little different. Take a photo of your yarrow 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.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
Get the app · Or check it from a photo now, free
Questions people ask
- Can I stake my yarrow?
- You can use small garden stakes or hoops to support the stems, but fixing the light issue is a better long term solution.
- Should I cut back leggy yarrow?
- Yes, cutting back the stems by a third to a half can help the plant grow back thicker and more compact.
More problems with Yarrow
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.