Can I save a plant with downy mildew?

Unfortunately, it is very difficult to save an impatiens plant once downy mildew takes hold. It is best to remove it to protect your other plants.

Are these spots caused by pests?

Sometimes aphids can cause leaf distortion or yellowing, but they do not typically cause distinct spots. Check for small insects on new growth if you are unsure.

Busy Lizzie: spots, causes and fixes

Check these first

Look at the undersides of the leaves for white fuzz.
Check if the spots are wet or dry.
Observe if the plant is wilting or collapsing.

Likely causes

Downy mildew
Most likely
How to tell: Yellowing leaves followed by white fungal growth on the undersides and eventual plant collapse.
What to do: Remove and destroy any infected plants immediately to stop the spread. Do not compost them, as the spores can survive in the soil.
Water splashing
Possible
How to tell: Small brown or tan spots appear on the leaves after watering from above.
What to do: Water at the base of the plant to keep the foliage dry. Use a watering can with a long spout to reach the soil directly.

Leaf spots on other plants

Find out what's wrong with your busy lizzie

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

If you see white fuzz on the undersides of leaves, it is likely downy mildew and the plant should be removed. Small spots from water are usually cosmetic and not a major threat.

Stopping it coming back

Water at the base of the plant and ensure good airflow between your impatiens.

Busy Lizzie: spots? Check yours with a photo

Every plant is a little different. Take a photo of your busy lizzie 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 save a plant with downy mildew?: Unfortunately, it is very difficult to save an impatiens plant once downy mildew takes hold. It is best to remove it to protect your other plants.
Are these spots caused by pests?: Sometimes aphids can cause leaf distortion or yellowing, but they do not typically cause distinct spots. Check for small insects on new growth if you are unsure.

Guides to these causes

Downy Mildew

What are these spots on my impatiens leaves?