Consider 'Mellow Yellows' coneflower (Echinacea purpurea ... Since they've been interbred from 'Ruby Giant' purple coneflower and yellow coneflowers, 'Tomato Soup' coneflowers, too, showcase ...

In the late 1960s, Donovan sang about mellow yellow; I’m guessing he was not a gardener. After the winter months, a bed of ...