My Hydrangeas!

My hydrangeas have all bloomed except my endless summer...The purple one that is my profile picture on hometalk concerns me as the leaves have come back after cutting the blooms and are small, few, the plant is not full of leaves and alot of the leaves start out green then brown comes on them and they become crumbly around the edges of the leaves...Next to the purple one I have a limelight that is wild and I have got to move it because it takes over the area...Next to the limelight I have an endless summer that is blooming but some of its leaves have brown on them as well...Next to that one I have a blue Hydrange...Do you think they have a disease on them????
Thanks, Shirley
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