soil deficiency

[JO JO]

can somone help ihave a problem with curling leaves on a flowering cherry tree.other wise healthy.
                  Thanks JO JO

[JO JO]

[Robert_Brenchley]

I can't come up with anything but aphids. When I was a kid we had a cherry outside the back door which suffered very badly from this every year. Check the back of the leaves, the chances are they'll be covered in aphids.

[jennym]

Definitely sounds like aphids.