Summer-dry gardens can be beautiful. The art and science of gardening is learning which plant prosper in garden settings. Many plants are meant for summer-dry climates and don’t need lots of water, though careful irrigation improves their beauty. I do water my own California garden in summer; and so does every farm and every garden – all summer. It simply doesn’t rain. The irrigation water has to come from somewhere, other than a faucet.
We expect summers to be dry here in California. In summer-dry and mediterranean climates dry summers are not drought, they are normal and rainless. Gardeners learn to adapt and use plants that are native to this climate and ecoregion.