Are these spots contagious to my other plants?

If it is a fungal issue, it can spread through water splashes or air. It is best to isolate the affected hibiscus until it recovers.

Can I use a fungicide?

You can use a copper based fungicide if the spots persist, but fixing your watering habits is the most important step.

Why are there spots on my hibiscus leaves? Causes and fixes

Check these first

Look at the undersides of the leaves for tiny insects.
Check if the leaves stay wet for long periods after watering.
Examine the spots to see if they are fuzzy or have a halo.

Likely causes

Fungal Leaf Spot
Most likely
How to tell: You will see small dark or reddish brown spots that may have a yellow halo around them. These often appear after periods of high humidity or rainy weather.
What to do: Remove the affected leaves immediately to stop the spread. Improve air circulation around the plant and avoid getting water on the leaves when you irrigate.
Pest Damage
Possible
How to tell: Tiny yellow or white spots appear where insects like whiteflies have been feeding on the sap. Look closely at the undersides of the leaves for small white insects.
What to do: Wash the leaves with a gentle stream of water or use insecticidal soap. Apply the soap every 5 to 7 days until the pests are gone.

Leaf spots on other plants

Find out what's wrong with your tropical hibiscus

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

Small, isolated spots are usually manageable, but you should worry if the spots are spreading quickly or causing leaves to yellow and fall off. It is normal to see occasional minor blemishes on outdoor plants.

Stopping it coming back

Water only at the base of the plant and ensure it gets plenty of direct sunlight to dry off quickly.

Tropical Hibiscus: spots? Check yours with a photo

Every plant is a little different. Take a photo of your tropical hibiscus 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

Are these spots contagious to my other plants?: If it is a fungal issue, it can spread through water splashes or air. It is best to isolate the affected hibiscus until it recovers.
Can I use a fungicide?: You can use a copper based fungicide if the spots persist, but fixing your watering habits is the most important step.

Guides to these causes

Leaf Spot

Why are there spots on my hibiscus leaves?

Check these first

Not sure what's wrong with your tropical hibiscus?