Orange Trees

Orange Trees added on March 20, 2017 | Answered

I have 5 different orange trees, and all have the same problem: small hard fruit, discolored, dark on sides. I also have a grapefruit tree without any problems. Can you suggest a solution?

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Liz Baessler
Certified GKH Gardening Expert
Answered on March 21, 2017

You might be looking at Alternaria Rot. This is a fungal disease that attacks oranges but leaves grapefruits alone. It would cause those hard, dark sides on your fruits. This site offers some good advice on treating and preventing it:

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