Can I save a tree with Verticillium wilt?

You can manage it by pruning infected parts, but there is no cure. Focus on keeping the tree hydrated and healthy to help it resist further decline.

Is yellowing always a disease?

Not always, as it can be a reaction to extreme weather or poor drainage. Always rule out watering issues before assuming it is a fungus.

Smooth sumac: yellow leaves, causes and fixes

Check these first

Feel the soil to see if it is waterlogged or completely dry.
Look for wilting on only one side or branch of the tree.
Check the base of the trunk for any signs of decay or damage.

Likely causes

Verticillium wilt
Possible
How to tell: Leaves turn yellow or brown and wilt on specific branches while the rest of the tree looks fine. This is a serious soil fungus that blocks water flow.
What to do: Prune out the infected branches well below the damage using sterilized tools. If the entire tree is wilting, it may need to be removed to prevent the fungus from spreading to other plants.
Improper watering
Possible
How to tell: Leaves turn yellow and may feel soft if the soil is constantly soggy. If the soil is bone dry, the leaves may turn yellow and crispy before falling.
What to do: Adjust your schedule to water every 7 to 14 days. Ensure the soil drains well and never let the roots sit in standing water.

Yellow leaves on other plants

Find out what's wrong with your smooth 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.

When to worry

Yellowing is normal in late autumn as the tree prepares for winter dormancy. If it happens in midsummer, it is a sign of trouble.

Stopping it coming back

Plant in well draining soil to avoid root issues. Avoid wounding the trunk with lawn equipment, as this creates entry points for fungi.

Smooth sumac: yellow leaves? Check yours with a photo

Every plant is a little different. Take a photo of your smooth 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.

Get the app · Or check it from a photo now, free

Questions people ask

Can I save a tree with Verticillium wilt?: You can manage it by pruning infected parts, but there is no cure. Focus on keeping the tree hydrated and healthy to help it resist further decline.
Is yellowing always a disease?: Not always, as it can be a reaction to extreme weather or poor drainage. Always rule out watering issues before assuming it is a fungus.

Guides to these causes

Verticillium Wilt

Why are my smooth sumac's leaves turning yellow?