One of my most important gardening goals for this year is establishing echinacea in several parts of my garden. So I ordered several bags of echinacea seeds from a seed shop. (I actually didn't pay attention on the exact latin name) However, I just noticed that seeds are not of Echinacea purpurea (which is the most common in gardens, and I expected this species), but of Echinacea angustifolia:
Do you know what are differences between Echinacea purpurea and Echinacea angustifolia, from gardening point of view?