Hello carontregs, eventually you may have to, just depends how nasty our dry hot weather goes year after year, which perennial plants you have planted and how you take care of them. There are just some plants that grow so much better in the cooler Bay area side than in our thermal heat/cold inversion side.
I know how you feel, we get same conditions here and we are at the beginning part of Central Valley. So pretty much my garden looks happier in Spring and in Fall, in between, it is survival of the fittest, the one that endures the heat best will last longer.
Try to read this link, it will help you understand more about perennials:
http://garden.org/courseweb/pe...
