Will the leaves grow back on bare stems?

Usually no, the plant will focus on growing new stems from the base or the top. You can prune back bare stems to encourage new growth.

Can I save a plant that has lost most of its leaves?

If the stem is still green and firm, there is a good chance it will recover with consistent care. Keep it in a bright spot and maintain steady moisture.

Common sowthistle: leaf drop, causes and fixes

Check these first

Check if the soil is completely dry and pulling away from the pot.
Look for white dusty spots on the remaining leaves.
Ensure the plant is not sitting in a drafty or extremely hot area.

Likely causes

Severe Drought
Most likely
How to tell: The leaves become crispy and brown at the edges before falling off. The soil will be bone dry and pulling away from the sides of the pot.
What to do: Water the plant thoroughly until water runs out the bottom of the pot. Resume a regular schedule of watering every 3 to 7 days to keep the soil consistently moist.
Powdery Mildew
Possible
How to tell: This is less common for this plant, usually caused by poor air circulation and high humidity. You will see white, dusty patches on the leaves before they yellow and drop.
What to do: Increase airflow around the plant by moving it to a more open area. Remove heavily infected leaves and avoid wetting the foliage when you water.

Find out what's wrong with your common sowthistle

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.

When to worry

Occasional leaf drop after a move or a change in temperature is normal. Worry if the plant is losing leaves daily and looks wilted.

Stopping it coming back

Keep the soil moisture stable and ensure the plant has plenty of space for air to move around it.

Keep your common sowthistle 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.

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Questions people ask

Will the leaves grow back on bare stems?: Usually no, the plant will focus on growing new stems from the base or the top. You can prune back bare stems to encourage new growth.
Can I save a plant that has lost most of its leaves?: If the stem is still green and firm, there is a good chance it will recover with consistent care. Keep it in a bright spot and maintain steady moisture.

Why is my common sowthistle dropping its leaves?