I found this very interesting and worth sharing from Dave…
After mediocre, or worse, results with coneflowers in prior years, it suddenly seems I’ve gained a magical touch. In recent years, only a lone white flowered ‘Coconut Lime’ has survived, which is remarkable since it must peek out for sunlight from beneath an ever spreading cypress.
A year ago, after repeated failures with purple coneflowers that any novice can succeed with, I planted a second white, ‘Powwow White’ (above), with the reasoning that if one white can succeed, perhaps a second will also. And, it has.
In fact, ‘Powwow’ has now spawned several vigorous seedlings, all in shades of purple. These are thriving, and in truth it is clear that I have done nothing except plant this coneflower in an ideal situation. Which is, of course, as many of the notable successes of this garden are, a complete accident since the coneflower was planted in one of very few spots open at the time.