Among the first perennials I bought after becoming a Master Gardener, I have over the years been more than happy to "share the wealth" and give many of these invasive plants away. Last year, it even occurred to me that I should eradicate them all from my landscape. Now I am glad I saved a few of them; so cheerful on a cool October morning! Its neighbor, a Rosemary, is in bloom also (it's always in bloom!), but cannot compete with the Swamp Sunflower's showiness.