Hydrangeas

We have 2 hydrangeas (sp?) plants in our yard. I didn't know last year that they went dormant for the winter, so when they started dying first I started watering them like crazy, then I pruned them to death. They are very odd looking now, but they are finally starting to bloom again. This year hopefully I'll do a better job with them.

One has pink flowers and one has purple flowers. Which is odd because I thought that the acidity of the soil affected the flower color, but they are right next to each other and you'd think it would be the same soil. Oh well, I don't mind, they are pretty to me!