Dietitians are the only qualified health professionals that assess, diagnose and treat dietary and nutritional problems at an individual and wider public-health level. They work with both healthy and sick people.
I have 3 different types of coneflowers: purple, yellow (Goldsturm), and orange (Sunset?). The purple I put in 2 years ago, and just isn't growing. It is still less than 5-6 tall with only 2 leaves, and surprisingly bloomed one pathetic flower. It still looks like the day I brought it home from the nursery.
When to Plant Coneflower Seeds. Coneflowers (Echinacea purpurea) can take up to two years to begin flowering when grown from seed, but once they begin blooming, they provide long-lasting flowering every summer. Coneflowers grow in U.S. Department of Agriculture plant hardiness zones 3 through 9.