Leaves curling on my pomegranate tree HELP!

hello all
so i started this pomegranate tree from my neighbors tree via cuttings, it has been a year and the tree is growing beautifully as i finally planted her in our back yard, recently i noticed some of the leaves are curling in a weird fashion, and i did notice few ants on the stems, but did not find any aphids under the leaves or anywhere really, could the curling be due to over feeding with miracle grow? what could be the issue, any help would be greatly appreciated.