My Peony bush is forming red leaves
I have a red Karl Rosenfeld peony which came with two beautiful unopened flowers. I planted the bush and had to move it as my mother felt it was too close to the fence, since its her garden I moved it but then noticed a two days later that it wasn't stable enough and so I moved it back towards the fence. The two flowers have since died an early death and so I cut the heads off and left the plant. Now it isn't dead but it hasn't re-flowered. I've heard that sometimes a peony that has been moved will not re-flower for a while so I wasn't too bothered but now I am noticing that the leaves are turning from green to red. Is this some kind of a disease or normal? I sprayed it with an organic neem product, a kind of all around disease product. The leaves do not look unhealthy per se, meaning they are not shriveled they are just not flowering and turning a reddish color.
I would be grateful for any advice I receive thank you (especially since I don't want my mother to complain that I moved the plant back and killed it)