Coneflowers, or echinacea as they're also known, are a familiar sight with their large, plum purple and dusky pink daisy-like flowers blooming from July to October. They are the stars of the show ...

That's because when a coneflower has more petals, it denies pollinators a conducive landing pad and a heady supply of pollen and nectar. They rarely set seeds, making the retention of dead flower ...