Curled leaves on JM

[szelelaci]

Hi all! Last year I bought few variaties of JM from a big dutch garden center specialized on maples. The leaves on two of them are weird to me. Tried to search what it can be, but regarding maple desease always ran into anthracnose and verticillium wilt. They are described as severe infections with a rapid course. These plants are holding up and developing ok, but it seems quite obvious they are not 100% healthy.
Any idea what it can be, and how to cure them?

 

[crab apple]

More shade, less sun

 

[giventofly]

Aren't they full sun trees?

 

[bonsaichile]

Aren't they full sun trees?

No, in nature the grow under the canopy of bigger trees. Some dappled sun and they will thank you

 

[August]

No, in nature the grow under the canopy of bigger trees. Some dappled sun and they will thank you

Colorado folks know... at work we get these, boxwoods, thuja, alberta spruce returned all the time, because people saw the "full sun" tag and didnt bother asking

 

[szelelaci]

Thanks for the replies! I hope you're right. However they were not in full sun until now either but moving them to more shade would be an easy fix.