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Japanese Mock Orange · Pittosporum tobira

Why are my Pittosporum tobira leaves turning yellow?

Yellowing leaves are less common for this plant and usually point to issues with watering or soil drainage. Check your soil moisture first to see if the roots are sitting in water.

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yellow leaves on a plant
Photo: Trio3D, CC BY-SA 4.0

Check these first

  1. Check the soil moisture by sticking your finger an inch deep.
  2. Inspect the drainage holes to ensure they are not clogged.
  3. Look at the underside of the leaves for any signs of pests.

Likely causes

  1. Overwatering

    Most likely

    How to tell: The leaves turn yellow and feel soft or mushy to the touch. You might also notice the soil stays wet for more than two weeks.

    What to do: Stop watering immediately and let the top 2 inches of soil dry out. Ensure your pot has drainage holes and never let the plant sit in a saucer of standing water.

  2. Nutrient deficiency

    Possible

    How to tell: Older leaves turn yellow while the veins remain green. This often happens if the plant has been in the same pot for several years without fresh soil.

    What to do: Apply a balanced liquid fertilizer diluted to half strength during the growing season. If the plant is severely root bound, repot it into a slightly larger container with fresh potting mix.

Yellow leaves on other plants

Find out what's wrong with your japanese mock orange

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

It is normal for the oldest, lowest leaves to yellow and drop occasionally as the plant grows. Worry if the yellowing is spreading rapidly across the entire canopy.

Stopping it coming back

Stick to a consistent watering schedule and only water when the top inch of soil feels dry.

Japanese Mock Orange: yellow leaves? Check yours with a photo

Every plant is a little different. Take a photo of your japanese mock orange 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.

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Questions people ask

Should I cut off the yellow leaves?
Yes, you can snip them off with clean shears to keep the plant looking tidy. They will not turn green again.
Can too much sun cause yellowing?
Yes, intense direct sun can bleach leaves, making them look pale yellow or washed out. Move the plant to a spot with filtered light.

More problems with Japanese Mock Orange

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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.