Pocket Botanist
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Check these first
- Stick your finger one inch into the soil to check for dampness.
- Look at the drainage holes to ensure they are not blocked.
- Check if the yellowing is happening on older leaves near the bottom.
Likely causes
Overwatering
PossibleHow to tell: The leaves turn yellow and feel soft or limp to the touch. The soil remains wet for more than 14 days after watering.
What to do: Allow the top inch of soil to dry out completely before adding more water. Ensure your pot has drainage holes and never let the plant sit in a saucer of standing water.
Nutrient deficiency
PossibleHow to tell: The leaves turn a pale 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, slow release fertilizer in early spring. If the plant is severely root bound, repot it into a slightly larger container with fresh potting mix.
Find out what's wrong with your 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
Worry if the yellowing spreads rapidly across the whole plant or if the stems start to turn mushy. It is normal for a few older leaves at the bottom to yellow and drop as the plant grows.
Stopping it coming back
Stick to a consistent watering schedule and only water when the top inch of soil is dry. Use a well draining potting mix to prevent water from pooling around the roots.
Keep your mock orange healthy from here
Save your plant in Pocket Botanist and you get care reminders timed for this plant, plus a care history that shows what worked. Identification and a health check are free.
Questions people ask
- Should I remove the yellow leaves?
- Yes, you can gently pluck them off as they will not turn green again. Removing them helps the plant focus its energy on healthy new growth.
- Could pests cause yellow leaves?
- Yes, aphids can cause yellowing by sucking sap from the leaves. Inspect the undersides of the leaves for tiny clusters of insects.
More problems with Mock orange
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- Why does my mock orange have root rot?
- Why are my mock orange leaves curling?
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.