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Check these first
- Inspect the undersides of leaves for aphids.
- Feel the soil moisture 3 inches deep.
- Check for signs of sticky honeydew on the leaves.
Likely causes
Aphid infestation
Most likelyHow to tell: Look for tiny green or black insects on the undersides of leaves or near the new growth. You might also see a sticky residue called honeydew on the foliage.
What to do: Spray the leaves with a strong stream of water to knock them off. If they persist, apply insecticidal soap once a week for 3 weeks.
Overwatering
PossibleHow to tell: The leaves turn yellow and feel soft or limp to the touch. The soil around the base of the plant stays wet for more than 2 days after watering.
What to do: Stop watering immediately and let the top 3 inches of soil dry out completely. Adjust your schedule to water only every 10 to 14 days once the soil feels dry.
Find out what's wrong with your staghorn sumac
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
Worry if the yellowing spreads rapidly across the entire plant. A few yellow leaves near the bottom of the plant in late summer is normal aging.
Stopping it coming back
Keep the plant in full sun and avoid overwatering to keep the foliage strong and less attractive to pests.
Staghorn sumac: yellow leaves? Check yours with a photo
Every plant is a little different. Take a photo of your staghorn sumac 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
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Questions people ask
- Will yellow leaves turn green again?
- No, once a leaf turns yellow, it will not return to green. It is best to let the plant shed it naturally.
- Do aphids kill Staghorn Sumac?
- Usually no, but a heavy infestation can weaken the plant and make it look unsightly. Treat them early to prevent damage.
Guides to these causes
More problems with Staghorn sumac
Back to the Staghorn sumac 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.