Fortunately there are a few things we can do to help ameliorate our lack of summer moisture.
Perhaps the most important thing to think about is correct plant selection. We live in dry areas, and cannot grow wet climate plants without a lot of difficulty.
Extra colour can be added by other dry loving bulbs, perennials and annuals, as well as a good dose of the very fashionable succulents, such as Aloes and Agaves.
Many natives wild thrive in these conditions too, especially some of the smaller leaved Coprosmas, the silver-leaved and golden flowered Brachyglottis, and many of the Hebes, which were also a feature in the Hastings gardens.