‘Heat’ is a powerful sensory stimulus – look at how it is used in advertising everything from perfumes to cars. Heat equates to danger, excitement, sexual attraction. Plants can very much evoke a sense of heat too, with vivid colours setting the pulse racing. Rudbeckia and Echinacea are two prairie flowers that love it as the mercury climbs and look just right shimmering in the sun. Add into the mix the calming balance of some flowering grasses and you have a ready-made planting combination that ...