Can I use a fungicide on my Northern starflower?

Yes, you can use a mild organic fungicide if the infection is widespread. However, fixing the airflow and moisture issues is more important for long term health.

Should I cut off all the spotted leaves?

Yes, removing infected leaves helps reduce the amount of fungus present. Just make sure to use clean scissors and throw the leaves in the trash, not the compost.

Northern starflower: spots, causes and fixes

Check these first

Inspect the undersides of leaves for signs of fungal growth.
Check the soil moisture level with your finger.
Assess the airflow in the area where the plant is growing.

Likely causes

Fungal Leaf Spot
Most likely
How to tell: You will see dark or discolored circular spots appearing on the leaves. These often spread when the plant stays wet for too long.
What to do: Remove the affected leaves immediately to stop the spread. Improve air circulation around the plant and avoid overhead watering to keep the foliage dry.
Overwatering
Possible
How to tell: The soil feels soggy and the spots may look water soaked or mushy. This creates the perfect environment for fungal growth.
What to do: Let the top inch of soil dry out slightly before watering again. Ensure your planting site has excellent drainage.

Leaf spots on other plants

Find out what's wrong with your northern starflower

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

Worry if the spots are spreading rapidly to new growth or if the entire leaf turns yellow and drops. A few small spots on older leaves are usually not a major concern.

Stopping it coming back

Water at the base of the plant rather than over the leaves, and ensure the plant has enough space for air to move around it.

Northern starflower: spots? Check yours with a photo

Every plant is a little different. Take a photo of your northern starflower and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.

Get the app · Or check it from a photo now, free

Questions people ask

Can I use a fungicide on my Northern starflower?: Yes, you can use a mild organic fungicide if the infection is widespread. However, fixing the airflow and moisture issues is more important for long term health.
Should I cut off all the spotted leaves?: Yes, removing infected leaves helps reduce the amount of fungus present. Just make sure to use clean scissors and throw the leaves in the trash, not the compost.

Guides to these causes

Leaf Spot

Why does my Northern starflower have spots on its leaves?