Hot summers and prolonged dry spells have resulted in people looking for plants that don't need as much water. These include various types of spurge, everlasting, calamint and stonecrop. Plants such as the purple coneflower (pictured) can cope with dry spells too. If a plant has silver-grey, hairy leaves, this is a sign that it is especially tolerant of drought. The light reflects the sunlight and therefore doesn't overheat, while the fine hairs minimise water evaporation.