Pocket BotanistCheck these first
- Check if the top inch of soil is dry.
- Inspect the area for nearby air vents or drafty windows.
- Look for signs of spider mites on the undersides of leaves.
Likely causes
Drought stress
Most likelyHow to tell: The leaves become brittle and fall off after the soil stays dry for too long. You will notice the stems drooping before the leaves start to drop.
What to do: Water the plant thoroughly until water runs out of the drainage holes. Keep the soil consistently moist, checking the top inch every 3 to 7 days.
Temperature shock
PossibleHow to tell: Leaves drop suddenly after you move the plant to a new spot or if it sits near an air vent. The remaining leaves might look green but feel limp.
What to do: Move the plant to a stable spot away from heating or cooling vents. Ensure it stays in a location with consistent temperatures between 65 to 80 degrees.
Find out what's wrong with your mexican petunia
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 plant to shed a few older leaves after being moved to a new home. Worry if the leaf drop is rapid and affects the entire plant.
Stopping it coming back
Keep the soil moisture consistent and avoid placing the plant in the direct path of airflow from vents.
Keep your mexican petunia 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
- Will my plant grow new leaves?
- Yes, once you fix the environmental stress, the plant will push out new growth from the nodes.
- Should I fertilize a plant that is dropping leaves?
- No, wait until the plant shows signs of recovery before adding any fertilizer.
More problems with Mexican petunia
- Why are there tiny webs on my Mexican petunia?
- Why is my Mexican petunia not blooming?
- Why is my Mexican petunia drooping?
- Why is my Mexican petunia looking so leggy?
- Why are my Mexican petunia's leaves turning yellow?
- Why are my Mexican petunia's leaf tips turning brown?
- Why does my Mexican petunia look sick at the roots?
- Why are my Mexican petunia leaves curling?
Back to the Mexican petunia guide
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.