You'll need hardy plants that can withstand reflected sun and heat from the rocks, the pool and the pool surround. In addition, the soil should be as porous as possible. Once the soil is properly prepared, try the following in your Zone 9 garden:
Fuschia spp.
Aster alpinus (Alpine aster)
Aquilegia spp. (Columbine)
Crested or dwarf Iris
Iberis sempervirens (Evergreen candytuft)
Myosotis scorpioides (Forget-me-not)
Sempervivum spp. (Hens and chicks)
Sedum spp.
Ceratostigma plumbaginoides (Leadwort)
Armeria maritima (Sea thrift)
Wild thyme (Thymus serpyllum)