My neighbor has a large very well established hydrangea macrophylla bush by her back door. It's the endless summer variety. We're in zone 10a. I also have one but mine is potted. I've had mine only since last summer. It's done well. It went dormant in the winter. It began blooming again in early spring and all throughout the summer months but it seems to be going dormant now. It does require a whole lot of water in our sandy soil so I don't really think it's worth the trouble if you don't have an area for it that naturally remains moist.
