Shrubs that are sun lovers - all varietiies of Hebe, Cistus, Buddleia. Perenials ie flowers that die down in winter and re appear in spring - Coreopsis, Geraniums(Hardy), Penstemons, Crocosmia, Daylily, Japanese Anenome. Annuals ie flowers that only last one season and then die -Petunia, Busy Lizzie, marigold to name but a few. Pop into your nearest Garden Centre and you will get some free advice. ps with this heatwave plants are under stress and will need a good soak unless you have a hosepipe ban. good luck