Cacti , most of which belong to the Cactaceae family, are fun and interesting plants that come in all sorts of shapes, textures and dramatic colours. Most don't have leaves, but instead, produce spines which protect them from herbivores and provide some shade. They are extremely hardy, drought tolerant and are not fussy about positioning or soil quality. They can survive in very dry, arid conditions, which makes them ideal to grow in Australian gardens. They produce spectacular flowers with bright yellows, reds, whites and pinks during the summer. Cacti are easy to propagate and maintain with little effort.