Pocket BotanistCheck these first
- Inspect the leaves for white dusty patches of mildew.
- Check the soil to see if it is bone dry or waterlogged.
- Look for signs of aphids on the stems.
Likely causes
Severe water stress
PossibleHow to tell: Leaves turn yellow or brown and fall off rapidly after a period of extreme drought or flooding.
What to do: Adjust your watering to ensure the soil stays moist but not soggy. Use a 2 inch layer of mulch to help regulate soil moisture levels.
Powdery mildew
PossibleHow to tell: You see a white dusty coating on the leaves before they turn yellow and drop off.
What to do: Improve air circulation by pruning crowded branches. Apply a horticultural oil or neem oil spray to the affected leaves in the early morning.
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 plant is losing a large percentage of its foliage in mid-summer. It is normal for the plant to lose some leaves in late autumn as it prepares for dormancy.
Stopping it coming back
Maintain good air circulation around the shrub and keep the soil consistently moist during the growing season.
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
- Is leaf drop always a sign of disease?
- No, it is often a reaction to environmental stress like drought or heat. Check your care routine before assuming it is a disease.
- Does this plant flower?
- Yes, mock orange produces beautiful, fragrant white flowers in late spring or early summer. To bloom well, it needs at least 6 hours of sunlight and proper moisture throughout the spring.
More problems with Mock orange
- Why are there bugs on my Mock orange?
- What are these spots on my Mock orange leaves?
- Why is my Mock orange not blooming?
- Why is my mock orange growing so leggy?
- Why are my mock orange leaves curling?
- Why are my mock orange leaves turning yellow?
- Why are my mock orange leaves getting brown tips?
- Why is my mock orange plant drooping?
- Why is my mock orange showing signs of root rot?
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.