Why are there bugs on my common sowthistle?

Check these first

1. Inspect the undersides of the leaves for tiny clusters of insects.
2. Look for sticky residue on the foliage.
3. Check if ants are actively patrolling the stems.

Likely causes

1. Aphid infestation

   Most likely

   How to tell: You will see small, soft bodied insects clustered on new leaves or flower stems. They often leave behind a sticky residue called honeydew.

   What to do: Spray the plant with a strong stream of water from your hose to knock them off. If they persist, apply a gentle insecticidal soap every 5 to 7 days until they are gone.

2. Ant farming

   Possible

   How to tell: You notice ants crawling up and down the stems of your sowthistle. They protect aphids to harvest the honeydew they produce.

   What to do: Focus on clearing the aphids first, as the ants will lose interest once their food source is gone. You can also place a sticky barrier around the base of the stem to block their path.

When to worry

A few aphids are manageable, but if the leaves start curling or the plant stops growing, you need to act quickly. Heavy infestations can weaken the plant significantly.

Stopping it coming back

Keep your plant healthy with consistent water and good airflow. Regularly inspect new growth during the spring months.

Questions people ask

Will aphids kill my sowthistle?

Usually no, but they can stunt its growth and make it look messy. It is best to wash them off early.

Can I use neem oil?

Yes, neem oil is effective against aphids. Apply it in the evening to avoid burning the leaves in the sun.

More problems with Common sowthistle

• Why are there white spots on my common sowthistle?
• Why is my common sowthistle drooping?