Check these first
- Inspect the undersides of the leaves for fungal growth.
- Check the fruit for shriveling or dark spots.
- Examine the stems for any sunken lesions.
Likely causes
Black Rot
Most likelyHow to tell: You will see small reddish brown spots that turn black and develop tiny black dots in the center. It often spreads to the fruit, causing it to shrivel and turn into mummies.
What to do: Remove and destroy all infected leaves and mummified fruit immediately. Apply a fungicide labeled for grapes every 7 to 14 days during the active growing season.
Anthracnose
PossibleHow to tell: This causes sunken, dark spots with light centers on leaves and stems. It can cause shoots to look scorched or twisted.
What to do: Prune out all infected wood during the dormant season. Keep the area around the base of the vine clean of debris to prevent spores from splashing back up.
Find out what's wrong with your muscadine grape
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.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
When to worry
If the spots are spreading rapidly to the fruit, you need to act fast to save your harvest. A few isolated spots on older leaves late in the season are usually harmless.
Stopping it coming back
Prune your vines to improve airflow and always water at the base of the plant to keep the foliage dry.
Muscadine grape: spots? Check yours with a photo
Every plant is a little different. Take a photo of your muscadine grape 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.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
Get the app · Or check it from a photo now, free
Questions people ask
- Can I eat the grapes if there are spots on the leaves?
- If the fruit itself is healthy and shows no signs of rot, it is safe to eat. However, the vine will be weaker next year if the disease is not managed.
- Will the spots go away on their own?
- No, fungal spots will not disappear. You must remove the infected parts and treat the vine to stop the fungus from spreading.
Guides to these causes
More problems with Muscadine grape
- Why is my Muscadine grape vine getting so leggy?
- Why are my Muscadine grape leaves curling?
- Why are my muscadine grape leaves turning yellow?
- What is eating my muscadine grape leaves?
- Why is my Muscadine grape vine drooping?
- Why is my Muscadine grape losing its leaves?
- Why is my Muscadine grape not producing flowers?
- How do I fix root rot in my Muscadine grape?
Back to the Muscadine grape guide
This article was generated with AI on from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.

