Granny Smith apple tree - Ask Extension
Hi - I recently added a couple honeycrisp apple trees and one granny smith tree to my yard (all were about 6-7 feet tall when purchased). Both the hon...
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Granny Smith apple tree #833401
Asked June 02, 2023, 2:32 PM EDT
Hi - I recently added a couple honeycrisp apple trees and one granny smith tree to my yard (all were about 6-7 feet tall when purchased). Both the honeycrisp trees seem to be doing well, but I'm a bit concerned about the granny smith tree. The leaves are curling and the leaves don't look healthy. Not sure if I'm underwatering, overwatering, or if there's an insect/fungus issue? The first picture below shows some of the smaller leaves that may be close to dropping.
I'm hoping you can help me diagnose what's causing my issue. Please see the attached images, and thank you in advance!
Hennepin County Minnesota
Expert Response
There is a myriad of things that can cause the leaves of an apple tree to curl: overwatering, over fertilization, heat, and, of course, disease.
The most prevalent diseases are Apple Scab and Fire Blight, but I see no indication of those diseases.
We had this question last week and it was noted that there has been a lot of aphid activity. Since the leaves don't show any spotting or indication of disease you might look for aphids and, if you find them, spray with insecticidal soap.
If the tree is dropping leaves, it could be lack of nutrients so some fertilization might be in order.
It has been hot lately too!
Here is a great piece from the U on growing apple trees at home:
Growing apples in the home garden | UMN Extension
Keep an eye on the tree and get back to me if you see something else.
The most prevalent diseases are Apple Scab and Fire Blight, but I see no indication of those diseases.
We had this question last week and it was noted that there has been a lot of aphid activity. Since the leaves don't show any spotting or indication of disease you might look for aphids and, if you find them, spray with insecticidal soap.
If the tree is dropping leaves, it could be lack of nutrients so some fertilization might be in order.
It has been hot lately too!
Here is a great piece from the U on growing apple trees at home:
Growing apples in the home garden | UMN Extension
Keep an eye on the tree and get back to me if you see something else.
Thank you. Very helpful!
