Japanese Maple Trees
Q.

Japanese Maple tree’s leaves curl

Zone Southeast Michigan | gnatconnel added on May 2, 2015 | Answered

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

A.
A.Answers to this queston: Add Answer
shelley
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:
https://www.gardeningknowhow.com/plant-problems/pests/insects/homemade-aphid-control.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/controlling-thrips.htm

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