Ageratina altissima 'Chocolate'
3-5' tall with chocolate-toned stems and foliage and 3-4" wide dense clusters of long-lasting white flowers in late summer. Incredible contrast plant! Attracts butterflies. Thrives in full sun with moist, well-drained soil, but will handle afternoon shade. Likes cool nights. Also sold as Eupatorium rugosum. Toxic if ingested. Zone 3-8. Native. Rain garden plant.