Japanese Maple Trees

Japanese Maple Tree’s Leaves Curl

gnatconnel added on May 2, 2015 | Answered

Our Japanese Maple tree's leaves curl and discolor about mid season. How do we protect it?

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Certified GKH Gardening Expert
Answered on May 3, 2015

I suspect that it is caused by leaf scorch. Here is an article about leaf scorch in japanese maples which will give you guidelines on how to prevent it:

Sample photo: http://www.missouribotanicalgarden.org/Portals/0/Gardening/Gardening%20Help/images/Pests/Scorch1190.jpg

Article with advice: https://www.rhs.org.uk/advice/profile?pid=591

Anthracnose can also cause discoloration and leaf curl:
Photos & Information: https://urbanext.illinois.edu/hortanswers/detailProblem.cfm?PathogenID=5

Insects such as aphids and thrips can also cause leaf curl as well:

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