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Empress Tree · Paulownia tomentosa

Why are my Empress Tree leaves turning yellow?

Yellowing leaves on your Empress Tree often signal a struggle with moisture or a pest infestation. Check the undersides of the leaves first to see if tiny insects are hiding there.

Check these first

  1. Inspect the undersides of the yellowing leaves for tiny insects.
  2. Check the soil moisture level by sticking your finger 3 inches deep.
  3. Look for sticky residue on the foliage.

Likely causes

  1. Aphid infestation

    Most likely

    How to tell: You will see clusters of tiny, pear shaped insects on the undersides of leaves or near new growth. The leaves may also feel sticky from the honeydew they leave behind.

    What to do: Spray the leaves with a strong stream of water to knock them off. If they persist, apply insecticidal soap every 5 to 7 days until they are gone.

  2. Overwatering

    Possible

    How to tell: The leaves turn yellow and feel soft or mushy. The soil stays wet for a long time after you water it.

    What to do: Stop watering until the top 2 to 3 inches of soil feel dry to the touch. Ensure the planting site has good drainage so water does not pool around the roots.

When to worry

If the yellowing spreads rapidly across the whole tree or if the leaves start dropping, it is time to take action. A few yellow leaves at the base of the tree in late summer are usually normal.

Stopping it coming back

Keep your tree healthy with consistent watering and monitor for pests early in the season.

Not sure which one it is? Photograph your empress tree.

This page lists the usual causes. Pocket Botanist looks at your actual leaf 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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Questions people ask

Can aphids kill my tree?
Usually no, but they can weaken it significantly. It is best to treat them early to keep your tree growing strong.
Should I fertilize yellow leaves?
No, do not fertilize a stressed tree. Fix the watering or pest issue first.

More problems with Empress Tree

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This article was generated with AI from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.