&quot;Green Envy&quot; - Echinacea Purpurea  The 20&quot; tall stems are topped, starting in mid-June, with large 4.5&quot; wide flowers composed of a dark cone with a green center...a hummingbird favorite. Surrounding the cone are long petals that are pink toward the cone, changing to lime-green toward the downward recurving tips.  Zone: 4-9  Ht: 20&quot;  Culture: Sun