Pocket Botanist
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Check these first
- Feel the soil two inches deep to check for moisture.
- Inspect the base of the stem for any signs of rot.
- Check if the area has standing water after rain.
Likely causes
Overwatering
Most likelyHow to tell: The lower leaves turn yellow and feel soft or mushy to the touch. The soil remains damp for many days after you last watered.
What to do: Stop watering immediately and let the soil dry out completely. If the soil is heavy, mix in some coarse sand or grit to improve drainage for next time.
Nutrient Deficiency
PossibleHow to tell: The leaves turn a pale yellow while the veins remain green. This usually happens if the plant has been in the same spot for many years without any compost.
What to do: Apply a light layer of organic compost around the base of the plant in early spring. Avoid heavy synthetic fertilizers as they can cause weak, rapid growth.
Find out what's wrong with your butterfly weed
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.
Scan with your phone's camera to get the app
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When to worry
It is normal for a few older leaves at the bottom to yellow as the plant matures. Worry only if the yellowing spreads rapidly to the top of the plant.
Stopping it coming back
Ensure your Butterfly weed is planted in well draining soil and never water unless the top few inches of soil are dry.
Butterfly weed: yellow leaves? Check yours with a photo
Every plant is a little different. Take a photo of your butterfly weed 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
- Should I cut off the yellow leaves?
- Yes, you can snip them off with clean scissors to keep the plant looking tidy. This also helps you monitor if the yellowing continues to spread.
- Can too much sun cause yellow leaves?
- No, Butterfly weed loves full sun. If your plant is yellowing, it is almost certainly a soil or water issue rather than light exposure.
More problems with Butterfly weed
Back to the Butterfly weed guide
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.