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Check these first
- Feel the soil 3 inches deep to check for excess moisture.
- Look for standing water around the tree trunk.
- Check the leaf veins to see if they are still green.
Likely causes
Overwatering
Most likelyHow to tell: The leaves turn yellow and feel soft or limp to the touch. The soil around the base stays soggy for days after rain.
What to do: Stop watering immediately and let the top 3 inches of soil dry out. Ensure the area around the tree has good drainage so water does not pool.
Nutrient deficiency
PossibleHow to tell: The yellowing appears between the leaf veins while the veins remain green. This often happens in alkaline soils.
What to do: Apply a balanced tree fertilizer in early spring. If the soil pH is too high, add elemental sulfur to help the tree absorb nutrients better.
Find out what's wrong with your box elder
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 some older leaves to yellow and drop in late summer. Worry if the yellowing covers the entire canopy or happens early in the season.
Stopping it coming back
Maintain a consistent watering schedule during dry spells and mulch around the base to keep soil moisture stable.
Box elder: yellow leaves? Check yours with a photo
Every plant is a little different. Take a photo of your box elder 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
- Will yellow leaves turn green again?
- No, once a leaf has turned yellow, it will not return to green. Focus on keeping the new growth healthy.
- Does my tree need more fertilizer?
- Only if you have confirmed the soil is lacking nutrients. Over-fertilizing can actually burn the roots and cause more yellowing.
More problems with Box elder
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.