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Cassia Trees

Q.What Is Attacking My Cassia Tree?

Zone Sarasota FL | Carole Warner added on May 19, 2024 | Answered

The leaves start yellowing with spots, then the leaves lose their chlorophyll. I have sprayed with copper sulfate fungacide and removed the bad leaves, I have also given nitrogen fertilizer and Thrive but the same thing happened again. Is this a bacteria or a fungus? What to do? Thank you for your suggestions.

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Certified GKH Gardening Expert
Answered on May 21, 2024

Cassia trees can suffer from bacterial leaf spot, fungal leaf spot, and anthracnose, all of which cause shot holes with black dots in the center of yellow rings, eventually leaving holes. Bacterial and fungal leaf spots start with small, water-soaked or brown spots that enlarge and develop yellow halos, while anthracnose causes dark, sunken lesions. Insects can also cause similar damage. To manage these issues, remove affected leaves, ensure good air circulation, avoid overhead watering, and use fungicides or insecticides if necessary. Bacterial leaf spot is often not curable and must be managed by removing infected parts and practicing good hygiene. I wouldn't fertilize in times of stress, though. This will add unnecessary stress while it is already under stress.

You can find your local extension service, where they can do more testing, with the search bar on the bottom of this page:


These articles will offer tips on treating these diseases:




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